Everywhere: Rename ASSERT => VERIFY

(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED)

Since all of these checks are done in release builds as well,
let's rename them to VERIFY to prevent confusion, as everyone is
used to assertions being compiled out in release.

We can introduce a new ASSERT macro that is specifically for debug
checks, but I'm doing this wholesale conversion first since we've
accumulated thousands of these already, and it's not immediately
obvious which ones are suitable for ASSERT.

Userland/Libraries/LibELF/DynamicLinker.cpp

@@ -87,7 +87,7 @@ static void map_library(const String& name, int fd)
     auto loader = ELF::DynamicLoader::try_create(fd, name);
     if (!loader) {
         dbgln("Failed to create ELF::DynamicLoader for fd={}, name={}", fd, name);
-        ASSERT_NOT_REACHED();
+        VERIFY_NOT_REACHED();
     }
     loader->set_tls_offset(g_current_tls_offset);
 
@@ -101,7 +101,7 @@ static void map_library(const String& name)
     // TODO: Do we want to also look for libs in other paths too?
     String path = String::formatted("/usr/lib/{}", name);
     int fd = open(path.characters(), O_RDONLY);
-    ASSERT(fd >= 0);
+    VERIFY(fd >= 0);
     map_library(name, fd);
 }
 
@@ -162,19 +162,19 @@ static void initialize_libc(DynamicObject& libc)
     // Also, we can't just mark `__libc_init` with "__attribute__((constructor))"
     // because it uses getenv() internally, so `environ` has to be initialized before we call `__libc_init`.
     auto res = libc.lookup_symbol("environ");
-    ASSERT(res.has_value());
+    VERIFY(res.has_value());
     *((char***)res.value().address.as_ptr()) = g_envp;
 
     res = libc.lookup_symbol("__environ_is_malloced");
-    ASSERT(res.has_value());
+    VERIFY(res.has_value());
     *((bool*)res.value().address.as_ptr()) = false;
 
     res = libc.lookup_symbol("exit");
-    ASSERT(res.has_value());
+    VERIFY(res.has_value());
     g_libc_exit = (LibCExitFunction)res.value().address.as_ptr();
 
     res = libc.lookup_symbol("__libc_init");
-    ASSERT(res.has_value());
+    VERIFY(res.has_value());
     typedef void libc_init_func();
     ((libc_init_func*)res.value().address.as_ptr())();
 }
@@ -203,12 +203,12 @@ static void load_elf(const String& name)
 {
     for_each_dependency_of(name, [](auto& loader) {
         auto dynamic_object = loader.map();
-        ASSERT(dynamic_object);
+        VERIFY(dynamic_object);
         g_global_objects.append(*dynamic_object);
     });
     for_each_dependency_of(name, [](auto& loader) {
         bool success = loader.link(RTLD_GLOBAL | RTLD_LAZY, g_total_tls_size);
-        ASSERT(success);
+        VERIFY(success);
     });
 }
 
@@ -223,11 +223,11 @@ static NonnullRefPtr<DynamicLoader> commit_elf(const String& name)
     }
 
     auto object = loader->load_stage_3(RTLD_GLOBAL | RTLD_LAZY, g_total_tls_size);
-    ASSERT(object);
+    VERIFY(object);
 
     if (name == "libsystem.so") {
         if (syscall(SC_msyscall, object->base_address().as_ptr())) {
-            ASSERT_NOT_REACHED();
+            VERIFY_NOT_REACHED();
         }
     }
 
@@ -288,7 +288,7 @@ void ELF::DynamicLinker::linker_main(String&& main_program_name, int main_progra
 
     int rc = syscall(SC_msyscall, nullptr);
     if (rc < 0) {
-        ASSERT_NOT_REACHED();
+        VERIFY_NOT_REACHED();
     }
 
     rc = main_function(argc, argv, envp);
@@ -299,7 +299,7 @@ void ELF::DynamicLinker::linker_main(String&& main_program_name, int main_progra
         _exit(rc);
     }
 
-    ASSERT_NOT_REACHED();
+    VERIFY_NOT_REACHED();
 }
 
 }