PR82322: S/390: Fix vec_ceil and friends

PR82322: S/390: Fix vec_ceil and friends

vec_ceil and friends are expanded by vecintrin.h to __builtin_s390_vfi
which is an overloaded builtin being replaced by either
__builtin_s390_vfisb or __builtin_s390_vfidb depending on its argument
types.

The problem in this PR was that the overloaded builtin definition of
__builtin_s390_vfi was missing in s390-builtins.def.

gcc/ChangeLog:

2017-10-06  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	PR target/82322
	* config/s390/s390-builtins.def (s390_vfi): Define new overloaded
	builtin.
	* config/s390/s390-builtin-types.def: Regenerate.

gcc/testsuite/ChangeLog:

2017-10-06  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	PR target/82322
	* gcc.target/s390/zvector/pr82322.c: New test.

From-SVN: r253481