Fix core-autopatch-two-rebar test

Mochiweb has moved from master to main branch.

index/mochiweb.mk

@@ -4,4 +4,4 @@ pkg_mochiweb_description = MochiWeb is an Erlang library for building lightweigh
 pkg_mochiweb_homepage = https://github.com/mochi/mochiweb
 pkg_mochiweb_fetch = git
 pkg_mochiweb_repo = https://github.com/mochi/mochiweb
-pkg_mochiweb_commit = master
+pkg_mochiweb_commit = main