move build-gtest-gmock into the Makefile

Makefile

@@ -70,3 +70,7 @@ $(info )
 endif
 
 include $(BOARD_HARDWARE_PATH)/$(KALEIDOSCOPE_PLUGIN_MAKEFILE_DIR)/rules.mk
+
+build-gtest-gmock:
+	(cd testing/googletest && cmake .)
+	$(MAKE) -C testing/googletest

bin/kaleidoscope-builder

@@ -592,11 +592,6 @@ EOF
     fi
 }
 
-build_gtest_gmock() {
-    kaleidoscope_dir="$(dirname "$0")/.."
-    (cd "${kaleidoscope_dir}/testing/googletest" && cmake . && make)
-}
-
 run_tests() {
     (cd "${BOARD_HARDWARE_PATH}/keyboardio" && make prepare-virtual)
     build_gtest_gmock