Replace
if test x${COMPILER_FOR_TARGET} = x"\$(CC)"; then
with
if test x"${COMPILER_FOR_TARGET}" = x"\$(CC)"; then
since COMPILER_FOR_TARGET may contain spaces when configuring GCC.
* configure: Regenerated.
config/
* clang-plugin.m4 (CLANG_PLUGIN_FILE_FOR_TARGET): Quote
${COMPILER_FOR_TARGET}.
* gcc-plugin.m4 (GCC_PLUGIN_OPTION_FOR_TARGET): Likewise.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>