Change wctype_t from enum to int

This increases bionic source compatibility with other libcs where
"wctype_t foo = 0;" is valid without -fpermissive.

Bug: 14646243
Change-Id: Ia9bd0785bc42c7b46e2bb6c3d9b9a9d3f769d983

libc/include/wchar.h

@@ -47,7 +47,7 @@ typedef struct {
 #endif
 } mbstate_t;
 
-typedef enum {
+enum {
     WC_TYPE_INVALID = 0,
     WC_TYPE_ALNUM,
     WC_TYPE_ALPHA,
@@ -62,7 +62,9 @@ typedef enum {
     WC_TYPE_UPPER,
     WC_TYPE_XDIGIT,
     WC_TYPE_MAX
-} wctype_t;
+};
+
+typedef int wctype_t;
 
 #define  WEOF        ((wint_t)(-1))