re PR libgomp/47804 (libgomp LD_LIBRARY_PATH doesn't include path to libgfortran)

	PR libgomp/47804
	* testsuite/libgomp.fortran/fortran.exp: Check for both
	libquadmath.a and libquadmath.${shlib_ext}.  If neither exists,
	but $blddir != "", still append ${blddir}/${lang_library_path}
	to ld_library_path.

From-SVN: r170285