internal/rosa: key-value type

This type is used very frequently. The new type is much easier to type and can receive helper methods eventually if needed.

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

internal/rosa/openssl.go

@@ -20,7 +20,7 @@ func (t Toolchain) newOpenSSL() (pkg.Artifact, string) {
 		OmitDefaults: true,
 
 		ConfigureName: "/usr/src/openssl/Configure",
-		Configure: [][2]string{
+		Configure: []KV{
 			{"prefix", "/system"},
 			{"libdir", "lib"},
 			{"openssldir", "etc/ssl"},