* objc/Make-lang.in: Create runtime-info.h and libobjc_entry.o in
	the build directory.
	(libobjc.a): Update dependency list.
	(libobjc.dll): Likewise.  Use libobjc_entry.o from the build
	directory.
	(objc/sendmsg.o): Add -Iobjc to find runtime-info.h.
	(objc.mostlyclean): Remove runtime-info.h.

From-SVN: r17143