python: change submodule import to be compatible with python3

wrappers/gmshpy/CMakeLists.txt

@@ -82,7 +82,7 @@ foreach(module ${SWIG_MODULES})
   swig_add_module(${module} python ${module}.i)
   swig_link_libraries(${module} ${PYTHON_LIBRARIES} shared)
   set(GMSH_PYTHON_MODULES_INCLUDE_CODE 
-      "${GMSH_PYTHON_MODULES_INCLUDE_CODE}from ${module} import *\n")
+      "${GMSH_PYTHON_MODULES_INCLUDE_CODE}from gmshpy.${module} import *\n")
   list(APPEND GMSHPY_DEPENDS "_${module}")
   if(APPLE)
     set_target_properties("_${module}" PROPERTIES LINK_FLAGS "-undefined suppress -flat_namespace")

wrappers/gmshpy/gmshGeo.i

@@ -4,7 +4,6 @@
 %include std_string.i
 %include std_list.i
 %include std_vector.i
-%import "gmshCommon.i"
 
 %{
   #include "GmshConfig.h"