Do not test for linker flags

Meson warns when doing that, as it's not really portable.

Since we're using platform-specific linker flags on Darwin, we can also
do the same on Linux; the syntax is GCC-specific, so we're going to need
Clang users to test it.

meson.build

@@ -279,12 +279,8 @@ endif
 
 common_ldflags = []
 
-if host_machine.system() == 'linux'
-  foreach ldflag: [ '-Wl,-Bsymbolic', '-Wl,-z,relro', '-Wl,-z,now', ]
-    if cc.has_argument(ldflag)
-      common_ldflags += [ ldflag ]
-    endif
-  endforeach
+if host_machine.system() == 'linux' and cc.get_id() == 'gcc'
+  common_ldflags += [ '-Wl,-Bsymbolic', '-Wl,-z,relro', '-Wl,-z,now', ]
 endif
 
 # Maintain compatibility with autotools