libc: tag missing functions in system headers.
This matches recent changes in the NDK header.
We enclose missing functions in #if 0 .. #endif blocks
with a clear "MISSING" in comments in order to locate
them later.
Change-Id: I87b3a62e777897e75c9243360fb0a82bcc53d9fb
diff --git a/libc/include/stdio.h b/libc/include/stdio.h
index d164e95..c38ed5a 100644
--- a/libc/include/stdio.h
+++ b/libc/include/stdio.h
@@ -300,8 +300,10 @@
#define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */
__BEGIN_DECLS
+#if 0 /* MISSING FROM BIONIC */
char *ctermid(char *);
char *cuserid(char *);
+#endif /* MISSING */
FILE *fdopen(int, const char *);
int fileno(FILE *);