* configure.in: Delete three unused variables. Move a variable

	definition closer to its use.  Simplify use_collect2 logic.  Start to
	organize.  Simplify tests for in-tree gas and ld.
	* configure: Regenerate.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@63778 138bc75d-0d04-0410-961f-82ee72b054a4