File undefine-gcc-macros.patch of Package wasi-libc

Undefine some macros because the build isn't happy about them.
diff --git a/Makefile b/Makefile
index 563f59f..6d478e9 100644
--- a/Makefile
+++ b/Makefile
@@ -688,6 +688,10 @@ check-symbols: startup_files libc
 	    -U__clang_wide_literal_encoding__ \
 	    -U__wasm_mutable_globals__ \
 	    -U__wasm_sign_ext__ \
+	    -U__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 \
+	    -U__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 \
+	    -U__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 \
+	    -U__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 \
 	    -U__GNUC__ \
 	    -U__GNUC_MINOR__ \
 	    -U__GNUC_PATCHLEVEL__ \