libc: Stub out sscanf()

libs/libc/include/stdio.h

@@ -138,6 +138,8 @@ extern "C"
     /* Writes at most max bytes of formatted output according to the string format to the string str. */
     int vsnprintf(char* str, size_t max, const char* format, va_list ap);
 
+    int sscanf(const char*, const char*, ...); // Not implemented.
+
     /* Writes the string str followed by a trailing newline to stdout. */
     int puts(const char* str);
 

libs/libc/src/stdio.cpp

@@ -53,4 +53,9 @@ extern "C"
     {
         NOT_IMPLEMENTED("remove");
     }
+
+    int sscanf(const char*, const char*, ...)
+    {
+        NOT_IMPLEMENTED("sscanf");
+    }
 }