Ports: Remove some config.sub patches and download a fresh one if needed

All of these patches did the same thing, which is already in upstream
config.sub.
With this change, we need only add `use_fresh_config_sub=true` to
the package.sh file.
Note that this is not done automatically in case the port has a modified
config.sub file.

Ports/libtool/package.sh

@@ -2,6 +2,7 @@
 port=libtool
 version=2.4
 useconfigure="true"
+use_fresh_config_sub="true"
 depends=("bash" "sed")
 files="https://ftpmirror.gnu.org/gnu/libtool/libtool-${version}.tar.xz libtool-${version}.tar.xz
 https://ftpmirror.gnu.org/gnu/libtool/libtool-${version}.tar.xz.sig libtool-${version}.tar.xz.sig

Ports/libtool/patches/config.sub.patch

@@ -1,10 +0,0 @@
---- libtool-2.4.6/libltdl/config/config.sub	2010-09-22 07:46:09.000000000 -0700
-+++ libtool-2.4.6/libltdl/config/config.sub	2021-04-11 18:46:03.374661972 -0700
-@@ -1301,6 +1301,7 @@
- 	# Each alternative MUST END IN A *, to match a version number.
- 	# -sysv* is not here because it comes later, after sysvr4.
- 	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
-+	      | -serenity* \
- 	      | -*vms* | -sco* | -esix* | -isc* | -aix* | -cnk* | -sunos | -sunos[34]*\
- 	      | -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \
- 	      | -sym* | -kopensolaris* \