Always print "$CC" version and "$CXX" version in travis build, if set.
Always print "$CC" version and "$CXX" version in travis build, if set.

scoder/cython,da-woods/cython,da-woods/cython,cython/cython,da-woods/cython,scoder/cython,scoder/cython,da-woods/cython,cython/cython,cython/cython,scoder/cython,cython/cython