[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/arch/power/power.h

@@ -0,0 +1,13 @@
+/* power.h -- check for POWER CPU features
+ * Copyright (C) 2020 Matheus Castanho <msc@linux.ibm.com>, IBM
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#ifndef POWER_H_
+#define POWER_H_
+
+extern int power_cpu_has_arch_2_07;
+
+void Z_INTERNAL power_check_features(void);
+
+#endif /* POWER_H_ */