[2.25 COMMITTED] hppa: Call exit directly in clone (BZ #21512)

[John David Anglin]

Combination of commits a363f70336aa90519f950327654165b9ed0b3b98,
48145e1c7dabaeab7ad8346d14f910cdeb6bc910, and hppa portion of
3f823e87ccbf3723eb4eeb63b0619f1a0ceb174e.

Dave
--
John David Anglin	dave.anglin@bell.net


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