Github #562: Use standard linux multiple path delimiter for PyArmNN includes

 * Update Readme

Change-Id: Iaf9e50d7c13cfd3fa1fd75fc423265288c0c7f32
Signed-off-by: Francis Murtagh <francis.murtagh@arm.com>
diff --git a/python/pyarmnn/setup.py b/python/pyarmnn/setup.py
index 7bc4a47..44e810d 100755
--- a/python/pyarmnn/setup.py
+++ b/python/pyarmnn/setup.py
@@ -129,7 +129,7 @@
     global armnn_include_path
     armnn_include_path_raw = os.getenv(armnn_include_env)
     if not armnn_include_path_raw == None:
-        armnn_include_path = armnn_include_path_raw.split(",")
+        armnn_include_path = armnn_include_path_raw.split(":")
 
     # validate input paths
     armnn_include_path_result = []