Make a host version of acc for testing.

Don't run the code we've compiled unless the -R option is present.
diff --git a/libacc/tests/testarm b/libacc/tests/testarm
index 24fbc42..1d4b866 100755
--- a/libacc/tests/testarm
+++ b/libacc/tests/testarm
@@ -6,4 +6,4 @@
 mm -j8
 cd tests
 adb sync
-adb shell /system/bin/acc -S /system/bin/returnval-ansi.c
+adb shell /system/bin/acc -R -S /system/bin/returnval-ansi.c