Clean up some autoconf cruft
* Make the source detection use a file unique to Stacker
* Configure Makefile.common.in with AC_CONFIG_FILES not AC_CONFIG_MAKEFILE
* Use new autoconf format for invoking AC_OUTPUT


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19165 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed