Rename/or delete references of lego-mac

Summary: lego-mac is dead and has been replaced with lego-mac-arm

Differential Revision: D65898391

fbshipit-source-id: 169c4db1ad535c0ddfc522c330d47c3b4884f4c4

Author: lebentle

build/lego-job-spec.sh

@@ -37,7 +37,7 @@ cat <<EOF
     "vcsType": "fbcode-fbsource",
     "capabilities": {
         "vcs": "fbcode-fbsource",
-        "type": "lego-mac",
+        "type": "ios-arm",
     },
     "priority": 3,
     "args": {