Add 'crates/wiggle/' from commit 'cd484e49932d8dd8f1bd1a002e0717ad8bff07fb'

git-subtree-dir: crates/wiggle
git-subtree-mainline: 2ead747f48
git-subtree-split: cd484e4993

crates/wiggle/tests/errno.witx

@@ -0,0 +1,13 @@
+(typename $errno
+    (enum u32
+        ;;; Success
+        $ok
+        ;;; Invalid argument
+        $invalid_arg
+        ;;; I really don't want to
+        $dont_want_to
+        ;;; I am physically unable to
+        $physically_unable
+        ;;; Well, that's a picket line alright!
+        $picket_line))
+