[PATCH] boehm-gc/Makefile.am remove warning during make check

[Gordon Sadler]

This is against gcc-3_0-branch. As of now it is the same in HEAD.

When running make check, when it enters boehm-gc and compiles gctest
with the new gcc. libgcjgc.so is dependant on libgcc_s.so, so you
receive some warnings about not being able to find libgcc_s.so. This
fixes the LDFLAGS to point to libgcc_s.so, removing that warning.

Gordon Sadler