- the infrastructure now uses autoconf 2.60.
- don't bother to patch libtool, we have USE_LIBTOOL across the board.
- set LIBTOOL_FLAGS to ignore static libraries by default. We will no
longer bother building arts with static libs, since arts is going to
die with kde4, and nothing hardly ever uses it now (in fact, the 3.5.7
release of arts includes no new code, only infrastructure changes)
