Generalised the reg test script again:  replaced the "cpu_test" line,
which caused the test to be skipped if the CPU type wasn't appropriate,
with a "prereq" line, which specifies a command that must succeed before
the test is run.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3041 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/helgrind/tests/x86/insn_mmxext.vgtest b/helgrind/tests/x86/insn_mmxext.vgtest
index 7a30fa4..2f5d9ef 100644
--- a/helgrind/tests/x86/insn_mmxext.vgtest
+++ b/helgrind/tests/x86/insn_mmxext.vgtest
@@ -1,3 +1,3 @@
 vgopts: -q
 prog: ../../../none/tests/x86/insn_mmxext
-cpu_test: x86-mmxext
+prereq: ../../../tests/cputest x86-mmxext