build broken on sparc-solaris2.7

[David Edelsohn]

	The build is broken everywhere.

	The last time I encountered this, it was due to Pmode in
machmode.def.  On many platforms, Pmode depends on target_flags for 32-bit
versus 64-bit word size.

	Was -DGENERATOR_FILE left off of some gen* file with a recent
change?  Is something included in the wrong order so that Pmode is not
overridden by machmode.def as it should be?

David