Check for thirft.protocol.fastbinary in both lib and lib64
Check for thirft.protocol.fastbinary in both lib and lib64

db301f6b992d36ea315c037fde954e01340be1e2 introduced an assertion on
the thrift build script which ensures that thrift.protocol.fastbinary
gets compiled in thrift's python bindings, however in some distros, the
shared object is placed on $PY_PREFIX/lib64 (instead of $PY_PREFIX/lib)
so we check in both locations.

Change-Id: Ib2294eff2f945af94de0345322f5496777fb1b08
Reviewed-on: http://gerrit.cloudera.org:8080/12915
Reviewed-by: Thomas Marshall <55b5d0aded728f7a3075d2dcc6abf84f96c36406@cloudera.com>
Tested-by: Thomas Marshall <55b5d0aded728f7a3075d2dcc6abf84f96c36406@cloudera.com>

timarmstrong/native-toolchain,cloudera/native-toolchain,cloudera/native-toolchain,cloudera/native-toolchain