i386: Add errno.h

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
diff --git a/include/asm-i386/errno.h b/include/asm-i386/errno.h
new file mode 100644
index 0000000..4c82b50
--- /dev/null
+++ b/include/asm-i386/errno.h
@@ -0,0 +1 @@
+#include <asm-generic/errno.h>