9007 import AT&T regex test suite
Reviewed by: Toomas Soome <tsoome@me.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>
Approved by: Dan McDonald <danmcd@joyent.com>

8355 need libc regex tests
Reviewed by: Robert Mustacchi <rm@joyent.com>
Approved by: Hans Rosenfeld <rosenfeld@grumpf.hope-2000.org>