internal/rosa/make: split build and check

Doing these together breaks far too many buggy makefiles.

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

internal/rosa/qemu.go

@@ -1,8 +1,6 @@
 package rosa
 
-import (
-	"hakurei.app/internal/pkg"
-)
+import "hakurei.app/internal/pkg"
 
 func (t Toolchain) newQEMU() pkg.Artifact {
 	const (
@@ -57,7 +55,6 @@ _notrun 'appears to spuriously fail on zfs'
 EOF
 )
 `,
-
 		Configure: [][2]string{
 			{"disable-download"},
 			{"disable-docs"},
@@ -70,10 +67,6 @@ EOF
 				"ppc-softmmu," +
 				"ppc64-softmmu"},
 		},
-
-		ScriptConfigured: `
-make "-j$(nproc)"
-`,
 	},
 		t.Load(Bash),
 		t.Load(Python),