work around libtool to fix alpha libgcj build

[Per Bothner]

Richard Henderson wrote:
> Which, for some reason, causes -DPIC to suddenly appear on the java
> compile line.  Which is wrong, of course.  Did I do something silly?

The appearance of -DPIC has been a problem with past versions of
libtool.  I think it's fixed now (at least 1.9f), but maybe you have an
older version of libtool?
-- 
	--Per Bothner
per@bothner.com   http://per.bothner.com/