wrappers: Remove an explicit -stdlib=libc++ in clang-scan-deps-wrapper

This gets set by the config file.

wrappers/clang-scan-deps-wrapper.c

@@ -94,9 +94,6 @@ int _tmain(int argc, TCHAR *argv[]) {
             exec_argv[arg++] = _T("-target");
             exec_argv[arg++] = target;
         }
-        if (target || has_target) {
-            exec_argv[arg++] = _T("-stdlib=libc++");
-        }
     }
 
     for (; i < argc; i++)

wrappers/clang-scan-deps-wrapper.sh

@@ -59,7 +59,7 @@ if [ -n "$CMD_EXE" ]; then
 fi
 
 if [ -n "$IS_CLANG" ]; then
-    "$EXE" "${FLAGS[@]}" -stdlib=libc++ "$@"
+    "$EXE" "${FLAGS[@]}" "$@"
 else
     "$EXE" "${FLAGS[@]}" "$@"
 fi