pretest-build-20190312: reautoconf for mflua -> lua53 dependency
git-svn-id: svn://tug.org/texlive/trunk/Build/source@50342 c570f23f-e606-0410-a88d-b1316a301751
git-svn-id: svn://tug.org/texlive/trunk/Build/source@50342 c570f23f-e606-0410-a88d-b1316a301751