Fix configure command native builds

Author: mcbarton

cmake/modules/GoogleTest.cmake

@@ -25,7 +25,7 @@ if (EMSCRIPTEN)
 		    -B ${CMAKE_BINARY_DIR}/unittests/googletest-prefix/src/googletest-build/)
   set(BUILD_COMMAND emmake make)
 else()
-  set(CONFIGURE_COMMAND CMAKE_ARGS -G ${CMAKE_GENERATOR}
+  set(CONFIGURE_COMMAND ${CMAKE_COMMAND} CMAKE_ARGS -G ${CMAKE_GENERATOR}
                 -DCMAKE_BUILD_TYPE=$<CONFIG>
                 -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
                 -DCMAKE_C_FLAGS=${CMAKE_C_FLAGS}