Add libtool files to CVS. Advantages:

- PHP-specific changes are easier to maintain
- it removes one dependency for users (i.e. GNU vs. FreeBSD ports)

I have not removed the libtool check in buildconf, since libzend/TSRM still
depend on a local version of libtool.

buildconf

@@ -114,11 +114,6 @@ fi
 
 ./scripts/preconfig
 
-rm -f ltmain.sh ltconfig
-libtoolize --automake --copy --force
-patch ltconfig < patch-aa
-patch ltmain.sh < patch-ab
-
 mv aclocal.m4 aclocal.m4.old 2>/dev/null
 aclocal
 if test "$?" != "0" -a "$am_prefix" != "$lt_prefix"; then