rx: add rx_opaque and rx_identity exports
rx_opaque_new @289
rx_opaque_alloc @290
rx_opaque_populate @291
rx_opaque_copy @292
rx_opaque_freeContents @293
rx_opaque_zeroFreeContents @294
rx_opaque_free @295
rx_opaque_zeroFree @296
rx_identity_match @297
rx_identity_populate @298
rx_identity_copy @299
rx_identity_copyContents @300
rx_identity_new @301
rx_identity_freeContents @302
rx_identity_free @303
Change-Id: Iaf52fdc65178db64c373b2f747ac133fdb713364
Reviewed-on: http://gerrit.openafs.org/3383
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>