Patch: FYI: gcj/libgcj JNI and Windows

[Ranjit Mathew]

> I'm checking this in to 3.3 and 3.4.

Since this patch slightly affects _Jv_LookupJNIMethod( ) for
other platforms as well (right shift by one in the usage of
the 'buf' array), can someone please test JNI again on a 
non-Win32 platform like, say, Linux/x86? (Including the
use of long names in addition to short names for overloaded
methods.) The "libjava.jni" set of tests in the libgcj
testsuite should be a nice sanity check.

AFAICT, there *should not* be any problems, but just to be
sure...

Many thanks in advance for the help.

Ranjit.