Put "mas" in the names of mas patches

Editor assessment

The subject states the naming change exactly: mas patches prefixed with mas in their names. The chore type fits patch housekeeping, and the absent scope is tolerable. No body is present, which is acceptable because the subject states the convention and the affected file set completely, though the confusion that motivated disambiguation would have been worth a line. The PR reference is well-formed. Imperative mood, no trailing period, compact length. A precise, self-sufficient housekeeping message for a change of this size.