internal/rosa/gnu: mpc 1.3.1 to 1.4.0

This package now unfortunately switched to xz as well.

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

internal/rosa/gnu.go

@@ -864,15 +864,17 @@ func init() {
 
 func (t Toolchain) newMPC() (pkg.Artifact, string) {
 	const (
-		version  = "1.3.1"
-		checksum = "o8r8K9R4x7PuRx0-JE3-bC5jZQrtxGV2nkB773aqJ3uaxOiBDCID1gKjPaaDxX4V"
+		version  = "1.4.0"
+		checksum = "75Sgr2hcDTltHYgFaHsRGsFgW74i2jqAUS0oXaBdJYKjMj_CvEeJ1zwGbNYjEl1H"
 	)
-	return t.NewPackage("mpc", version, pkg.NewHTTPGetTar(
-		nil, "https://gcc.gnu.org/pub/gcc/infrastructure/"+
-			"mpc-"+version+".tar.gz",
+	return t.NewPackage("mpc", version, pkg.NewHTTPGet(
+		nil, "https://ftpmirror.gnu.org/gnu/mpc/mpc-"+version+".tar.xz",
 		mustDecode(checksum),
-		pkg.TarGzip,
-	), nil, (*MakeHelper)(nil),
+	), &PackageAttr{
+		SourceKind: SourceKindTarXZ,
+	}, (*MakeHelper)(nil),
+		XZ,
+
 		MPFR,
 	), version
 }