pkg(buildx): add -w to ldflags

This disables DWARF generation, which dramatically decreases the size of the binary.

Notably, this does *not* include `-s` which disables the symbol table, as doing so would *also* make it so that `govulncheck` cannot be run on the resulting binary with meaningful results.

Before is ~90M and after is ~72M.

If we add `-s` as well, that ~72M drops to ~63M, but we also lose `govulncheck` so again, IMO, that's not worth doing.

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

Author: crazy-max

pkg/buildx/deb/rules

@@ -10,7 +10,7 @@ override_dh_auto_build:
 	go build \
 		-mod=vendor \
 		-trimpath \
-		-ldflags "-X github.com/docker/buildx/version.Version=$(VERSION) -X github.com/docker/buildx/version.Revision=$(REVISION) -X github.com/docker/buildx/version.Package=github.com/docker/buildx" \
+		-ldflags "-w -X github.com/docker/buildx/version.Version=$(VERSION) -X github.com/docker/buildx/version.Revision=$(REVISION) -X github.com/docker/buildx/version.Package=github.com/docker/buildx" \
 		-o "/usr/libexec/docker/cli-plugins/docker-buildx" \
 		./cmd/buildx
 

pkg/buildx/rpm/docker-buildx-plugin.spec

@@ -27,7 +27,7 @@ pushd ${RPM_BUILD_DIR}/src/buildx
 	go build \
 		-mod=vendor \
 		-trimpath \
-		-ldflags="-X github.com/docker/buildx/version.Version=%{_origversion} -X github.com/docker/buildx/version.Revision=%{_commit} -X github.com/docker/buildx/version.Package=github.com/docker/buildx" \
+		-ldflags="-w -X github.com/docker/buildx/version.Version=%{_origversion} -X github.com/docker/buildx/version.Revision=%{_commit} -X github.com/docker/buildx/version.Package=github.com/docker/buildx" \
 		-o "bin/docker-buildx" \
 		./cmd/buildx
 popd