make: remove $FLOCK variable
make: remove $FLOCK variable

The comments suggest you could set FLOCK to the empty string, but
doing so sets LINK to " $CC", with the preceding space.  That extra
space confuses the dependency checking, making us relink on every
build.

Instead, instruct anti-flock users to just set LINK directly.

Review URL: http://codereview.chromium.org/7793006
old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google,old8xp/gyp_from_google