extensions reference other shared libraries. Previously I tried to turn
all those shared libs into static libs, however that didn't pan out so well.
So now the libwiredtiger.so library is loaded by wterl.so also, later on
during use libwiredtiger.so will load libwiredtiger_snappy.so and
libwiredtiger_bzip2.so which now have libsnappy.a and libbz2.a respectively
linked statically so as to avoid confusion.
