Add an empty autoconf directory for submodule use
tree7222be0276ca9f9cb0050ef40508b804d7390b15
-rw-r--r-- 295 AUTHORS
-rw-r--r-- 2744 ChangeLog
-rw-r--r-- 5558 Makefile.am
-rw-r--r-- 14 NEWS
-rw-r--r-- 231 README
-rw-r--r-- 276 THANKS
drwxr-xr-x - autoconf
-rwxr-xr-x 74 autogen.sh
-rw-r--r-- 10002 configure.in
drwxr-xr-x - doc
drwxr-xr-x - include
-rwxr-xr-x 81 redo.sh
drwxr-xr-x - source
drwxr-xr-x - tests