s390.md ("udivsi3"): Ensure trap is generated for division by zero.

s390.md ("udivsi3"): Ensure trap is generated for division by zero.

gcc/ChangeLog:

	* config/s390/s390.md ("udivsi3"): Ensure trap is generated
	for division by zero.
	("umodsi3"): Likewise.

libjava/ChangeLog:

	* configure.host (DIVIDESPEC) [s390*-*-*]: Set to
	-fno-use-divide-subroutine.
	* include/s390-signal.h: Include <ucontext.h> and <limits.h>.
	(HANDLE_FPE): Define.
	(SIGNAL_HANDLER): Change third argument to ucontext_t *.
	(struct old_s390_kernel_sigaction): Likewise for k_sa_handler.
	(HANDLE_DIVIDE_OVERFLOW): Define.

From-SVN: r84683