Add strncat to wasm stdlib

Co-authored-by: Marshall <[email protected]>

Author: maxbrunsfeld

lib/src/wasm/stdlib-symbols.txt

@@ -17,6 +17,7 @@
 "realloc",
 "strcmp",
 "strlen",
+"strncat",
 "strncmp",
 "strncpy",
 "towlower",