Tweak testcases for pr70010

[testsuite]

	* gcc.target/powerpc/pr70010-2.c: Add -maltivec.
	* gcc.target/powerpc/pr70010-3.c: Add -maltivec.

gcc/testsuite/ChangeLog

+2020-02-11  Will Schmidt  <will_schmidt@vnet.ibm.com>
+
+	* gcc.target/powerpc/pr70010-2.c: Add -maltivec.
+	* gcc.target/powerpc/pr70010-3.c: Add -maltivec.
+
 2020-02-11  Stam Markianos-Wright  <stam.markianos-wright@arm.com>
 
 	* gcc.target/arm/simd/vdot-2-1.c: New test.

gcc/testsuite/gcc.target/powerpc/pr70010-2.c

 /* { dg-do compile } */
-/* { dg-options "-O2 -flto -mno-vsx" } */
+/* { dg-options "-O2 -flto -maltivec -mno-vsx" } */
 /* { dg-require-effective-target lto } */
+/* { dg-require-effective-target powerpc_altivec_ok } */
 
 vector int c, a, b;
 

gcc/testsuite/gcc.target/powerpc/pr70010-3.c

 /* { dg-do compile } */
-/* { dg-options "-O2 -mno-vsx" } */
+/* { dg-options "-O2 -maltivec -mno-vsx" } */
+/* { dg-require-effective-target powerpc_altivec_ok } */
 
 vector int c, a, b;