internal/rosa/gnu: grep artifact

Some GNU software do not like the grep in toybox.

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

internal/rosa/all.go

@@ -24,6 +24,7 @@ const (
 	Git
 	Go
 	Gperf
+	Grep
 	Gzip
 	Hakurei
 	HakureiDist
@@ -104,6 +105,7 @@ func ResolveName(name string) (p PArtifact, ok bool) {
 		"git":               Git,
 		"go":                Go,
 		"gperf":             Gperf,
+		"grep":              Grep,
 		"gzip":              Gzip,
 		"hakurei":           Hakurei,
 		"hakurei-dist":      HakureiDist,