Specify vector spec v1.0 in QEMU arguments.

Some testcases in GCC's testsuite check stdout.
Qemu will print a warning if the vector spec is not specified which will cause those testcases to fail.

The warning:
vector version is not specified, use the default value v1.0

Signed-off-by: Patrick O'Neill <[email protected]>

Author: patrick-rivos

scripts/march-to-cpu-opt

@@ -12,7 +12,7 @@ EXT_OPTS = {
   "zbb":             "zbb=true",
   "zbc":             "zbc=true",
   "zbs":             "zbs=true",
-  "v":               "v=true",
+  "v":               "v=true,vext_spec=v1.0",
   "zve32f":          "Zve32f=true",
   "zve64f":          "Zve64f=true",
   "zfh":             "Zfh=true",