Ports/stress-ng: Remove obsolete patches

The following features are now available in the system, making these
patches unnecessary:
- isblank() function
- SIGSTKSZ constant
- MS_SYNC and MS_ASYNC msync() flags
- EDQUOT errno constant

Ports/stress-ng/patches/0002-missing-types-and-functionality.patch

@@ -28,18 +28,6 @@ diff -ur stress-ng-master/core-helper.c stress-ng-master-2/core-helper.c
  }
 
  /*
-diff -ur stress-ng-master/core-job.c stress-ng-master-2/core-job.c
---- stress-ng-master/core-job.c	2020-11-07 10:52:22.000000000 -0800
-+++ stress-ng-master-2/core-job.c	2020-11-08 22:32:06.607668500 -0800
-@@ -28,7 +28,7 @@
- #define RUN_SEQUENTIAL	(0x01)
- #define RUN_PARALLEL	(0x02)
- 
--#define ISBLANK(ch)	isblank((int)(ch))
-+#define ISBLANK(ch)	(ch == ' ' || ch == '\t')
- 
- /*
-  *  stress_chop()
 diff -ur stress-ng-master/core-sched.c stress-ng-master-2/core-sched.c
 --- stress-ng-master/core-sched.c	2020-11-07 10:52:22.000000000 -0800
 +++ stress-ng-master-2/core-sched.c	2020-11-08 23:21:44.497668500 -0800

Ports/stress-ng/patches/0004-memory-related.patch

@@ -1,14 +1,3 @@
-diff -ur a/stress-stack.c b/stress-stack.c
---- a/stress-stack.c	2020-11-07 10:52:22.000000000 -0800
-+++ b/stress-stack.c	2020-11-08 22:55:15.567668500 -0800
-@@ -98,6 +98,7 @@
- {
- 	char *start_ptr = shim_sbrk(0);
- 	void *altstack;
-+	size_t SIGSTKSZ = 9000;
- 	ssize_t altstack_size = (SIGSTKSZ +
- 				 STACK_ALIGNMENT +
- 				 args->page_size) & ~(args->page_size -1);
 diff -ur a/stress-str.c b/stress-str.c
 --- a/stress-str.c	2020-11-07 10:52:22.000000000 -0800
 +++ b/stress-str.c	2020-11-08 22:55:55.887668500 -0800
@@ -21,18 +10,6 @@ diff -ur a/stress-str.c b/stress-str.c
  	{ "strcasecmp",		stress_strcasecmp,	strcasecmp },
  #endif
  #if defined(HAVE_STRLCAT)
-diff -ur a/stress-vm.c b/stress-vm.c
---- a/stress-vm.c	2020-11-07 10:52:22.000000000 -0800
-+++ b/stress-vm.c	2020-11-08 22:58:41.267668500 -0800
-@@ -2124,7 +2124,7 @@
- 
- 	ret = stress_oomable_child(args, &context, stress_vm_child, STRESS_OOMABLE_NORMAL);
- 
--	(void)shim_msync(context.bit_error_count, page_size, MS_SYNC);
-+	(void)shim_msync(context.bit_error_count, page_size, 0);
- 	if (*context.bit_error_count > 0) {
- 		pr_fail("%s: detected %" PRIu64 " bit errors while "
- 			"stressing memory\n",
 diff -ur a/stress-sigsegv.c b/stress-sigsegv.c
 --- a/stress-sigsegv.c	2020-11-07 10:52:22.000000000 -0800
 +++ b/stress-sigsegv.c	2020-11-08 22:50:22.327668500 -0800
@@ -50,50 +27,6 @@ diff -ur a/stress-sigsegv.c b/stress-sigsegv.c
  			inc_counter(args);
  		} else {
  #if defined(SA_SIGINFO)
-diff -ur a/stress-link.c b/stress-link.c
---- a/stress-link.c	2020-11-07 10:52:22.000000000 -0800
-+++ b/stress-link.c	2020-11-08 22:44:34.267668500 -0800
-@@ -97,8 +97,7 @@
- 			(void)stress_temp_filename_args(args,
- 				newpath, sizeof(newpath), i);
- 			if (linkfunc(oldpath, newpath) < 0) {
--				if ((errno == EDQUOT) ||
--				    (errno == ENOMEM) ||
-+				if ((errno == ENOMEM) ||
- 				    (errno == ENOSPC)) {
- 					/* Try again */
- 					continue;
-diff -ur a/stress-mmap.c b/stress-mmap.c
---- a/stress-mmap.c	2020-11-07 10:52:22.000000000 -0800
-+++ b/stress-mmap.c	2020-11-08 22:45:51.767668500 -0800
-@@ -243,7 +243,9 @@
- 	const bool mmap_file = context->mmap_file;
- 	const int fd = context->fd;
- 	int no_mem_retries = 0;
-+#if 0
- 	const int ms_flags = context->mmap_async ? MS_ASYNC : MS_SYNC;
-+#endif
- 	uint8_t *mapped, **mappings;
- 
- 	mapped = calloc(pages4k, sizeof(*mapped));
-@@ -322,7 +324,7 @@
- 		no_mem_retries = 0;
- 		if (mmap_file) {
- 			(void)memset(buf, 0xff, sz);
--			(void)shim_msync((void *)buf, sz, ms_flags);
-+			(void)shim_msync((void *)buf, sz, 0);
- 		}
- 		(void)stress_madvise_random(buf, sz);
- 		(void)stress_mincore_touch_pages(buf, context->mmap_bytes);
-@@ -424,7 +426,7 @@
- 								"not contain expected data\n", args->name, page_size);
- 						if (mmap_file) {
- 							(void)memset(mappings[page], n, page_size);
--							(void)shim_msync((void *)mappings[page], page_size, ms_flags);
-+							(void)shim_msync((void *)mappings[page], page_size, 0);
- #if defined(FALLOC_FL_KEEP_SIZE) && defined(FALLOC_FL_PUNCH_HOLE)
- 							(void)shim_fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
- 								offset, page_size);
 diff -ur a/stress-mmapmany.c b/stress-mmapmany.c
 --- a/stress-mmapmany.c	2020-11-07 10:52:22.000000000 -0800
 +++ b/stress-mmapmany.c	2020-11-08 22:47:27.567668500 -0800