[Library] Update zlibng (#1255)

* Update zlibng

* Set cmake path more directly in zlibng to hopefully fix an issue with the build on drone

* I'm dumb, missing / in path

* Mackal helps with a dumb gitignore issue

* Adding all the files, not sure what's ignoring them and im tired of looking

* Some tweaks to zlibng build to hopefully get it to build properly. works on msvc now

libs/zlibng/insert_string.c

@@ -0,0 +1,25 @@
+/* insert_string_c -- insert_string variant for c
+ *
+ * Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+ */
+
+#include "zbuild.h"
+#include "deflate.h"
+
+/* ===========================================================================
+ * Update a hash value with the given input byte
+ * IN  assertion: all calls to to UPDATE_HASH are made with consecutive
+ *    input characters, so that a running hash key can be computed from the
+ *    previous key instead of complete recalculation each time.
+ */
+#define HASH_SLIDE 16  // Number of bits to slide hash
+
+#define UPDATE_HASH(s, h, val) \
+    h = ((val * 2654435761U) >> HASH_SLIDE);
+
+#define INSERT_STRING       insert_string_c
+#define QUICK_INSERT_STRING quick_insert_string_c
+
+#include "insert_string_tpl.h"