re PR target/47230 (gcc fails to bootstrap on alpha in stage2 with "relocation truncated to fit: GPREL16 against ...")

	PR target/47230
	* configure.ac (alpha*-*-linux*): Use mh-alpha-linux.
	* configure: Regenerate.

config/ChangeLog:

	PR target/47230
	* mh-alpha-linux: New file.

From-SVN: r213081