[llvm] r230812 - Discourage in-source autoconf builds (as we already do for the cmake build)

[Joerg Sonnenberger]

On Fri, Feb 27, 2015 at 11:35:47PM -0000, Jonathan Roelofs wrote:
> +dnl Quit if it is an in-source build
> +if test ${srcdir} == "." ; then
> +  AC_MSG_ERROR([In-source builds are discouraged. Configure from a separate build directory.])
> +fi

Ignoring everything else, this is bad shell syntax. It is =.

Joerg