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/libseccomp.go

@@ -17,7 +17,7 @@ func (t Toolchain) newLibseccomp() (pkg.Artifact, string) {
 ln -s ../system/bin/bash /bin/
 `,
 
-		Patches: [][2]string{
+		Patches: []KV{
 			{"fix-export-oob-read", `diff --git a/src/api.c b/src/api.c
 index adccef3..65a277a 100644
 --- a/src/api.c