make: allow running git status during release build

Go 1.18 sets the -buildvcs flag to true by default which will stamp VCS
information into the binary, see https://go.dev/doc/go1.18#go-version
for details. However, in the current `make release` target the release
build is performed in a container and the `git status --porcelain`
command executed by `go build` under the hood fails with:

    fatal: unsafe repository ('/cilium-cli' is owned by someone else)
    To add an exception for this directory, call:

    	git config --global --add safe.directory /cilium-cli

Fix this by calling the suggested command in the container to allow
the Go toolchain executing git commands there.

Signed-off-by: Tobias Klauser <[email protected]>

Makefile

@@ -27,7 +27,7 @@ release:
 		--rm \
 		--workdir /cilium \
 		--volume `pwd`:/cilium docker.io/library/golang:1.18.0-alpine3.15 \
-		sh -c "apk add --no-cache make git && make local-release VERSION=${VERSION}"
+		sh -c "apk add --no-cache make git && git config --global --add safe.directory /cilium && make local-release VERSION=${VERSION}"
 
 local-release: clean
 	for OS in darwin linux windows; do \