[PATCH 1/2] S/390: Disable 3 global-array-* tests for 31-bit mode

[PATCH 1/2] S/390: Disable 3 global-array-* tests for 31-bit mode

These tests rely on larl->movdi merge, which is not implemented for
31-bit mode.

gcc/testsuite/ChangeLog:

2018-11-14  Ilya Leoshkevich  <iii@linux.ibm.com>

	* gcc.target/s390/global-array-almost-huge-element.c: Run only
	in 64-bit mode.
	* gcc.target/s390/global-array-almost-negative-huge-element.c:
	Likewise.
	* gcc.target/s390/global-array-even-element.c: Likewise.

From-SVN: r266144