Remove alloca config.h support.
 - I did not actually remove the configure test itself, someone who can
   regenerate configure should do this (see FIXME in autoconf/configure.ac)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79881 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed