kernel-yocto: check git config during checkout

Initialize the git config prior creating a git repository in a plain
directory.

(From OE-Core rev: 0e3a9bed988b5fd4de770fe8cd1160b9f6c8c365)

Signed-off-by: Justin Bronder <jsbronder@cold-front.org>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/kernel-yocto.bbclass

@@ -247,6 +247,7 @@ do_kernel_checkout() {
 		fi
 		rm -f .gitignore
 		git init
+		check_git_config
 		git add .
 		git commit -q -m "baseline commit: creating repo for ${PN}-${PV}"
 		git clean -d -f