* gcc/config/i386/linux.h: Add a comment to mark macros that are

	being overriden in config/k*bsd-gnu.h.
	* gcc/config/kfreebsd-gnu.h:  Redefine GLIBC_DYNAMIC_LINKER instead of
	DYNAMIC_LINKER.
	* gcc/config/knetbsd-gnu.h:  Ditto.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@112740 138bc75d-0d04-0410-961f-82ee72b054a4