gas object file locations
    
    With the update to newer autotools, some gas object files are now
    built in config/, breaking xtensa-elf and ia64-vms.  This patch fixes
    the dependencies.
    
    	* configure.ac: Specify extra_objects with leading "config/"
    	for xtensa-relax.o and te-vms.o.  Use case statements to unique
    	extra_objects.  Formatting.
    	* configure: Regenerate.
    
    (cherry picked from commit e11078da44268a4813ed81a27853143af86c3e24)