Adds missing space

src/linker.cpp

@@ -486,7 +486,7 @@ gb_internal i32 linker_stage(LinkerData *gen) {
 				platform_lib_str = gb_string_appendc(platform_lib_str, "-lm -Wl,-syslibroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -L/usr/local/lib");
 				#if defined(GB_SYSTEM_OSX)
 				if(gen->needs_system_library_linked) {
-					platform_lib_str = gb_string_appendc(platform_lib_str, "-lSystem");
+					platform_lib_str = gb_string_appendc(platform_lib_str, " -lSystem ");
 				}
 				#endif
 			} else {