Changeset 994202a4 in rtems for c/configure.in

Patch rtems-rc-20000615-4-cvs.diff from Ralf Corsepius
<corsepiu@…> to fix the following:

• lib/configure.in actually is libc's configure.in, so let it depend on libc not on lib [In my Cygnus/GNU configuration scheme, lib/include and lib/libc are treated as one unit, while libcpu and libbsp are treated as separate units.]

• Allow empty --enable-bare* flags for the bare bsp. The formerly used scheme is too strict for our multilib experiments.