Make-lang.in (jvspec.o): Don't define WITH_THREAD_x or WITH_GC_x flags.

Make-lang.in (jvspec.o): Don't define WITH_THREAD_x or WITH_GC_x flags.

	* Make-lang.in (jvspec.o): Don't define WITH_THREAD_x or WITH_GC_x
	flags.
	* jvspec.c (THREAD_NAME): Removed.
	(GC_NAME): Likewise.
	(MATHLIB): Likewise.
	(WITHLIBC): Likewise.
	(GCLIB): Likewise.
	(THREADLIB): Likewise.
	(MATH_LIBRARY): Likewise.
	(lang_specific_driver): Don't add `-l' options to command line.
	Instead, add a single --specs option.  Recognize `-L' options and
	use them to search for spec file.
	(find_spec_file): New function.
	(SPEC_FILE): New define.

From-SVN: r26883