Fix Go formatting issues to pass make local-check

Applied gofmt -s -w to fix formatting issues in pkglib/build.go that
were causing the make local-check target to fail during the gofmt step.

Signed-off-by: Paul Gaiduk <paulg@zededa.com>

src/cmd/linuxkit/Makefile

@@ -117,7 +117,7 @@ sign:
 
 install:
 	cp -R ./bin/* $(PREFIX)/bin
-	
+
 .PHONY: clean
 clean:
 	rm -rf bin *.log *-kernel *-cmdline *-state *.img *.iso *.gz *.qcow2 *.vhd *.vmx *.vmdk *.tar *.raw

src/cmd/linuxkit/pkglib/build.go

@@ -730,7 +730,7 @@ func (p Pkg) buildArch(ctx context.Context, d DockerRunner, c spec.CacheProvider
 	}
 
 	if bo.dryRun {
-		return []registry.Descriptor{registry.Descriptor{}}, nil
+		return []registry.Descriptor{{}}, nil
 	}
 
 	// find the child manifests