internal/rosa: populate runtime dependencies

This also removes manually resolved indirect dependencies.

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

internal/rosa/libgd.go

@@ -31,6 +31,10 @@ func init() {
 		Description: "an open source code library for the dynamic creation of images",
 		Website:     "https://libgd.github.io/",
 
+		Dependencies: P{
+			Zlib,
+		},
+
 		ID: 880,
 	}
 }