Moved test for libgcc to the module configure scripts, so that the installed...

Moved test for libgcc to the module configure scripts, so that the installed dynamic_module_makefile avoids containing stale values for it.

Rev: src/aclocal.m4:1.160
Rev: src/configure.in:1.1034
Rev: src/make_variables.in:1.29
Rev: src/modules/dynamic_module_makefile.in:1.124