Add build guide for other platforms

README.md

@@ -11,11 +11,19 @@ The main purpose of this repository is to port the engine for other platforms.
 * replace current buildsystem with waf
 * rewrite achivement system( to work without steam )
 # How to Build?
-On Linux:
 1. Clone repo ( ```git clone https://github.com/nillerusr/source-engine```)
 2. Run ```git submodule init && git submodule update```
-3. Build
+
+On Linux:
 ```
 ./waf configure -T debug
 ./waf build
 ```
+On Linux for Android(**Note: only Android NDK r10e is supported**):
+```
+export ANDROID_NDK=/path/to/ndk
+./waf configure -T debug --android=armeabi-v7a,4.9,21
+./waf build
+```
+On Windows:
+**TODO(WAF is not configured for Windows. Use VPC as temporary solution)**