build: Fix linker version script support detection

The tests for linker version script support were incorrect in both make
and meson build systems. The problem was that the script needs to match
the object it's used with, whereas the tests used dummy objects with no
matching symbols.

Updated both systems to test with proper symbol matching between the test
object and version script using a dedicated test.lds file.

Generated-by: Claude Code 1.0.65 (claude-sonnet-4@20250514)

Makefile

@@ -68,7 +68,7 @@ else
 	CFLAGS += $(shell $(PKG_CONFIG) --cflags yaml-0.1)
 endif
 
-HAS_VERSION_SCRIPT := $(shell echo 'int main(){}' | $(CC) -Wl,--version-script=/dev/null -x c - -o /dev/null 2>/dev/null && echo y)
+HAS_VERSION_SCRIPT := $(shell printf 'void test_func(){}\nint main(){}' | $(CC) -Wl,--version-script=libfdt/test.lds -x c - && echo y || echo n)
 
 ifeq ($(HOSTOS),darwin)
 SHAREDLIB_EXT     = dylib

libfdt/meson.build

@@ -1,5 +1,6 @@
 version_script = '-Wl,--version-script=@0@'.format(meson.current_source_dir() / 'version.lds')
-if not cc.has_link_argument(version_script)
+test_code = 'void test_func(){} int main(){}'
+if not cc.links(test_code, args: ['-Wl,--version-script=' + meson.current_source_dir() / 'test.lds'])
   version_script = []
 endif
 

libfdt/test.lds

@@ -0,0 +1,6 @@
+TEST {
+	global:
+		test_func;
+	local:
+		*;
+};