src/libpcp_fault/src/GNUmakefile: fix libpcp_fault build after bit rot
src/libpcp_fault/src/GNUmakefile: fix libpcp_fault build after bit rot

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp