Add wiki link to README files

Author: akallabeth

docs/README.android

@@ -6,6 +6,7 @@ The FreeRDP Android port consists of three parts:
 * FreeRDP library and its dependencies
 * JNI bindings (client/Android/android_freerdp.c
   and client/Android/Studio/freeRDPCore/src/main/java/com/freerdp/freerdpcore/services/LibFreeRDP.java)
+* More documentation might be found at https://github.com/FreeRDP/FreeRDP/wiki/Compilation
 
 Build requirements
 =================

docs/README.building

@@ -1,3 +1,6 @@
+
+More documentation might be found at https://github.com/FreeRDP/FreeRDP/wiki/Compilation
+
 FreeRDP has a few dependencies that are required for proper operation:
 
 1. SSL (required)

docs/README.ios

@@ -4,6 +4,8 @@ Overview
 The FreeRDP iOS port allows users to enjoy FreeRDP features on Apple iOS devices.
 The application was written to be compatible with devices running iOS 4.3 or higher. 
 
+More documentation might be found at https://github.com/FreeRDP/FreeRDP/wiki/Compilation
+
 Build requirements
 ==================
 

docs/README.macOS

@@ -1,3 +1,6 @@
+
+More documentation might be found at https://github.com/FreeRDP/FreeRDP/wiki/Compilation
+
 Starting with "El Capitan" Apple removed the openssl headers. Therefore it's
 required to build openssl manually upfront. For example by using MacPorts or Homebrew.
 To build FreeRDP against this library it's required to set the PKG_CONFIG_PATH

docs/README.mingw

@@ -1,6 +1,8 @@
 Overview
 ========
 
+More documentation might be found at https://github.com/FreeRDP/FreeRDP/wiki/Compilation
+
 FreeRDP can be built for Windows using llvm-mingw (https://github.com/mstorsjo/llvm-mingw) with both msvcrt and ucrt. 
 MinGW builds are not actively mantained at the moment and every once in a while the build process may stop working. Pull requests to maintain MinGW support are always welcome.