internal/rosa: chmod via patch helper

This works around the zfs overlay mount overhead and significantly reduces I/O in general.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/git.go

@@ -20,16 +20,18 @@ func (t Toolchain) newGit() pkg.Artifact {
 
 		t.Load(Zlib),
 	), nil, nil, `
-chmod -R +w /usr/src/git && cd /usr/src/git
+cd /usr/src/git
 make configure
 ./configure --prefix=/system
 make "-j$(nproc)" all
 make DESTDIR=/work install
-`, pkg.Path(AbsUsrSrc.Append("git"), true, pkg.NewHTTPGetTar(
-		nil, "https://www.kernel.org/pub/software/scm/git/"+
-			"git-"+version+".tar.gz",
-		mustDecode(checksum),
-		pkg.TarGzip,
+`, pkg.Path(AbsUsrSrc.Append("git"), true, t.NewPatchedSource(
+		"git", version, pkg.NewHTTPGetTar(
+			nil, "https://www.kernel.org/pub/software/scm/git/"+
+				"git-"+version+".tar.gz",
+			mustDecode(checksum),
+			pkg.TarGzip,
+		), false,
 	)))
 }
 func init() { artifactsF[Git] = Toolchain.newGit }