* tm-hppa.h (skip_trampoline_code): Add extern decl.

	* tm-hppa.h (skip_trampoline_code): Add extern decl.
	* hppa-tdep.c (hppa_pop_frame): Silently restart the inferior and
	allow it to execute any return path trampoline code.  Stop the
	inferior and give the user control when the trampoline has
	finished executing.
	(in_solib_call_trampoline): Handle export stubs which also perform
	parameter relocations.
	(in_solib_return_trampoline): Likewise.