libffi/include/Makefile.am - hack_DATA - whats it for?

[Kean Johnston]

All,

I am trying to bootstrap 3.3.1 from cvs of a few hours ago. I have just 
enabled Java for OSR5, and now during the bootstrap process, make aborts 
telling me it doesnt know how to build fficonfig.h in libffi/include. 
Simply remove it from the "hack_DATA" line fixes the build, but I want 
to make that wont break anything. I am sure its there for a reason.

FWIW, OSR5 is multilibbed, so that may have something to do with why its 
breaking.

Kean