Add --add-missing to autogen.sh automake for AUTOMAKE 1.14.

This creates a totally useless scritp autoconf/compile, but as automake
1.14 insists on it being there we have no choice.  Added autoconf/compile
to .gitignore.

No doubt a bug in AUTOMAKE.  Totally brain dead.  There are AUTOCONF macros
to handle the case of compilers that do not support the -o and -c flags.