Merge from projects/arm_eabi_vfp r255380:

Fix the VCVT instruction. It must round towards zero when converting from
a floating-point to an integer value. This was not the case causing issues
when printing certain values.

There is a VCVTR instruction that will round depending on the current
rounding mode. We don't yet support this instruction, or setting the
rounding mode.

contrib/binutils/gas/config/tc-arm.c

@@ -12660,14 +12660,14 @@ do_vfp_nsyn_cvt (enum neon_shape rs, int flavour)
       /* Conversions without bitshift.  */
       const char *enc[] =
         {
-          "ftosis",
+          "ftosizs",
-          "ftouis",
+          "ftouizs",
           "fsitos",
           "fuitos",
           "fcvtsd",
           "fcvtds",
-          "ftosid",
+          "ftosizd",
-          "ftouid",
+          "ftouizd",
           "fsitod",
           "fuitod"
         };