the QUIET flag in bsd.port.mk is tested the wrong way around (line
2162), resulting in PATCH_SILENT=yes when not given and PATCH_SILENT being
undefined when given. This results in 'make makepatch' failing:
[: !=: unexpected operator
Plan: 'make makepatch' and 'make QUIET=yes makepatch' in www/chromium with
PORTVERSION/distinfo set to 36.0.1985.103 should error out on a non-applying
patch, but not on errors from bsd.port.mk