re PR bootstrap/14760 (A bug in configure{,.in} prevents using both...

re PR bootstrap/14760 (A bug in configure{,.in} prevents using both --program-suffix and --program-prefix)

	PR bootstrap/14760
	* configure.in: When computing baseargs, strip *all* copies of
	offending options.  Also, don't match/substitute the trailing space,
	so that this actually works when two similar options are separated by
	only one space.
	* configure: Regenerate.

From-SVN: r80474