Create compile_commands.json if script exists

Author: gsingh93

Makefile

@@ -194,8 +194,8 @@ linux_menuconfig:
 linux $(KERNEL_IMAGE): $(LINUX_CONFIG) | $(CLANG_DIR)
 	+ $(LINUX_MAKE)
 # Older versions of Linux don't have this script
-ifneq (,$(wildcard ./.env))
-	$(LINUX_SRC)/scripts/clang-tools/gen_compile_commands.py -d $(LINUX_OUT)
+ifneq (,$(wildcard $(LINUX_SRC)/scripts/clang-tools/gen_compile_commands.py))
+	cd $(LINUX_SRC) && ./scripts/clang-tools/gen_compile_commands.py -d $(LINUX_OUT)
 endif