Makefile.in (TOOLS_LIBS): Pick C object files from the compiler build and use standard library variables.

	* gcc-interface/Makefile.in (TOOLS_LIBS): Pick C object files from the
	compiler build and use standard library variables.
	(../../vxaddr2line$(exeext): Do not depend on targext.o and adjust.
	(gnatmake-re): Do not depend on targext.o.
	(gnatlink-re): Do not depend on link.o and targext.o.
	(../../gnatmake$(exeext): Likewise.
	(../../gnatlink$(exeext): Likewise.

From-SVN: r201602