module to be built outside of a crash source tree on a ppc64le PPC64
little-endian host. Without the patch, "make -f snap.mk" would fail
to compile, indicating "gcc: error: macro name missing after '-D'"
(anderson@redhat.com)
extension module. Also fixed the progress percentage display to
correct for systems which have non-zero starting physical addresses.
(anderson@redhat.com)