add lint.py, which ignore .ph.h and .ph.cc
add lint.py, which ignore .ph.h and .ph.cc

dmlc/ps-lite,shilad/ps-lite,shilad/ps-lite,dmlc/ps-lite,xcgoner/ps-lite-new,xcgoner/ps-lite-new,xcgoner/ps-lite-new,xcgoner/ps-lite-new,dmlc/ps-lite,dmlc/ps-lite,shilad/ps-lite