loader.exp (gcj_loader_test_one): Use libjava_prune_warnings.

loader.exp (gcj_loader_test_one): Use libjava_prune_warnings.

	* libjava.loader/loader.exp (gcj_loader_test_one): Use
	libjava_prune_warnings.
	(gcj_loader_run): Likewise.
	* libjava.mauve/mauve.exp (test_mauve): Use
	libjava_prune_warnings.
	(test_mauve_sim): Likewise.
	* libjava.jni/jni.exp (gcj_jni_compile_c_to_so): Use
	libjava_prune_warnings.
	(gcj_jni_build_header): Likewise.
	* lib/libjava.exp (libjava_prune_warnings): New proc.
	(gcj_link): Use it.
	(test_libjava_from_source): Likewise.
	(test_libjava_from_javac): Likewise.

From-SVN: r60089