add install-hooks target utilizing checkpatch

hooks/pre-commit

+#!/bin/bash
+exec git diff --cached | scripts/checkpatch.pl --no-tree --no-signoff --ignore CONST_STRUCT,SPDX_LICENSE_TAG,LINE_CONTINUATIONS
+

src/Makefile

@@ -31,7 +31,7 @@ LIBS += -lmaputils
 plugin_subdirs ?= $(wildcard plugins/*)
 plugin_sofile = $(wildcard $(d)/*.so)
 plugin_files = $(foreach d, $(plugin_subdirs), $(plugin_sofile))
-
+HOOKS = pre-commit
 
 .PHONY: all check clean plugins FORCE
 
@@ -48,6 +48,8 @@ plugins:
 	@echo "$(plugin_subdirs)"
 	for i in $(plugin_subdirs); do [ -d $$i ] && $(MAKE) -C $$i all; done
 
+install-hooks:
+	$(foreach hook, $(HOOKS), ln -s -f ../../hooks/$(hook) ../.git/hooks/$(hook);)
 
 check: FORCE
 	@cppcheck --quiet --enable=all --inconclusive --std=c99 \