configure.in: Set INCLUDES to absolute path.

configure.in: Set INCLUDES to absolute path.

	boehm-gc:
	* configure.in: Set INCLUDES to absolute path.
	Save $INCLUDES in boehm-cflags, too.
	Set INCLUDES so it's available to config.status.
	* configure: Regenerate.

	libjava:
	* configure.in: Don't initialize GCINCS to boehm-gc/include.
	* configure: Regenerate.

	libjava/libltdl:
	* configure.in: Don't initialize GCINCS to boehm-gc/include.
	* Regenerate.

Co-Authored-By: Roger Sayle <roger@eyesopen.com>
From-SVN: r70233