Bootstrap failure on hppa-unknown-linux-gnu, trunk

[David Edelsohn]

> Thanks for the note.  We now have a new problem:

../../gcc/gcc/builtins.c: In function `expand_errno_check':
../../gcc/gcc/builtins.c:1671: error: `errno_set' undeclared (first use in this function)
../../gcc/gcc/builtins.c:1671: error: (Each undeclared identifier is reported only once
../../gcc/gcc/builtins.c:1671: error: for each function it appears in.)
../../gcc/gcc/builtins.c: In function `expand_builtin_mathfn_2':
../../gcc/gcc/builtins.c:1837: warning: unused variable `errno_set'

	Yes, this is due to Roger's patch.

David