added dependencies and build files (loosely inspired by Sebastian Dorda's love-native-android)

jni/libmng-1.0.10/bcb/mngview/README.TXT

@@ -0,0 +1,22 @@
+
+Please note : 
+
+ If your project includes the header file "Rpcndr.h", then
+you will then have to define "HAVE_BOOLEAN" before "libmng.h"
+is included. Why ? ...
+
+"jmorecfg.h" has
+#ifndef HAVE_BOOLEAN
+typedef int boolean;
+#endif
+
+ and "Rpcndr.h" has
+typedef unsigned char boolean
+
+ This >>MAY<< affect other libraries used in the same project
+that depend on the jpeg source - especially as "boolean" is
+used in structures (possible alignment problems). For example
+"Sam leffler's" LibTiff can be built with the Jpeg codec.
+
+ Just a little something to be aware of !. AP - 15/9/2000.
+