Allow adding CXXFLAGS and LDFLAGS on the command line.
Allow adding CXXFLAGS and LDFLAGS on the command line.

lekkas/livegrep,paulproteus/livegrep,lekkas/livegrep,paulproteus/livegrep,lekkas/livegrep,wfxiang08/livegrep,lekkas/livegrep,paulproteus/livegrep,lekkas/livegrep,wfxiang08/livegrep,wfxiang08/livegrep,paulproteus/livegrep,paulproteus/livegrep,paulproteus/livegrep,wfxiang08/livegrep,wfxiang08/livegrep,wfxiang08/livegrep,lekkas/livegrep