Merge to release, fix for fix in r35591:

sometimes __hppa is on PA-RISC but __hpux isn't
(e.g. on linux)

Fixes ticket #3537





[SVN r57049]

libs/detail

@@ -1 +1 @@
-Subproject commit 1ede593bc2c74b2ab09c21c9ae0262f995f7b0d6
+Subproject commit 726c4a71822abf27757d6f86fa4f9e55f29b016c