add pchk to Makefile
add pchk to Makefile


Former-commit-id: 126e383cfe6ca62f0615b8ae85bbc51b1afbbc5e [formerly 3e18b7daeac678ad6e063296ca4d034574425986]
Former-commit-id: 8564aadcfc0ec3cd020260a82c4bcbe40d0af4a4
simomarsili/elss