Just link fixes for b 2763938.

Added wcsxfrm.c and wmemcmp.c to the src files in Android.mk and removed wcsxfrm from wchar.c

Change-Id: Iab9b45cf78c27880d2941c360340a7af6b8964fe
diff --git a/libc/Android.mk b/libc/Android.mk
index b0301ef..4cfa17c 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -229,7 +229,9 @@
 	wchar/wcsstr.c \
 	wchar/wcstok.c \
 	wchar/wcswidth.c \
+	wchar/wcsxfrm.c \
 	wchar/wmemchr.c \
+	wchar/wmemcmp.c \
 	wchar/wmemcpy.c \
 	wchar/wmemmove.c \
 	wchar/wmemset.c \
diff --git a/libc/stdlib/wchar.c b/libc/stdlib/wchar.c
index 1480212..d83613a 100644
--- a/libc/stdlib/wchar.c
+++ b/libc/stdlib/wchar.c
@@ -302,12 +302,6 @@
     return (wchar_t*) strstr( (const char*)ws1, (const char*)ws2 );
 }
 
-size_t wcsxfrm(wchar_t *ws1, const wchar_t *ws2, size_t n)
-{
-    memcpy( (char*)ws1, (const char*)ws2, n );
-    return n;
-}
-
 int wctob(wint_t c)
 {
     return c;