[Committed][testsuite] Fix PR82442

[Wilco Dijkstra]

Recently the gcc.dg/vect/pr31699.c was modified to check for
vect_float effective target instead for vect_double.  As a 
result it now fails on armhf.  Fix by avoiding double.
Tested on armhf, aarch64 and x64.

Committed as trivial.

ChangeLog:
2017-10-16  Wilco Dijkstra  <wdijk...@arm.com>

    gcc/testsuite/
        PR target/82442
        * gcc.dg/vect/pr31699.c: Fix testcase.
--

diff --git a/gcc/testsuite/gcc.dg/vect/pr31699.c 
b/gcc/testsuite/gcc.dg/vect/pr31699.c
index 
7ec4dfe770a8ce0f98c6ff46e6f301e88b63fc0e..b0b9971fcfc9f6f90ccef7bf1de10fd109c3d07b
 100644
--- a/gcc/testsuite/gcc.dg/vect/pr31699.c
+++ b/gcc/testsuite/gcc.dg/vect/pr31699.c
@@ -7,9 +7,9 @@
 float x[256];
 
 __attribute__ ((noinline))
-double *foo(void)
+float *foo(void)
 {
- double *z = malloc (sizeof(double) * 256);
+ float *z = malloc (sizeof(float) * 256);
 
  int i;
  for (i=0; i<256; ++i)