Changes

tests/rename: fix hwloc_snprintf() redefinition
include <private/autogen/config.h> first, so that we have
HWLOC_HAVE_CORRECT_SNPRINTF for renaming hwloc_snprintf() or not, and
then include all headers where we redefine symbol names.
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

tests/rename: remove obsolete .svn directory filtering
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

tests/rename: rework dependencies
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

tests/rename: use $(CPP) instead of hardwiring cpp
On some of our platforms, cpp is the default old/buggy versions while
gcc points to a correct/modern compiler, and configure already uses gcc
-E for CPP.
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

tests/rename: also check $(CPP) warnings/errors during renaming
In case of conflicting renaming of macros as if they were functions
(such as the previously fixed hwloc_snprintf() renaming), etc.
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

bitmap: add hwloc_bitmap_nr_ulongs() and from/to_ulongs()
Useful for dumping/building an entire bitmap to/from an array of
unsigned longs.
Thanks to Junchao Zhang for the suggestion.
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>