add fopenmp to gcc lite

cmt/requirements-lite

@@ -14,7 +14,7 @@ use class *
 #C++ flags
 macro cppflags " -O2 -pipe -ansi -Woverloaded-virtual -Wpedantic -Wunused -Wmaybe-uninitialized -Wno-deprecated -Wno-div-by-zero -Wno-variadic-macros"
 # C flags
-macro cflags  " -O2  -fopenmp "
+macro_append cpplinkflags  " -fopenmp "
 
 # or for icpc (if you changed previously the compiler otherwise don't touch)
 #macro cppflags " -O2  -ip -ansi_alias -align -Wbrief "