Updated iOS platform files

Author: MykolaTryshnivskyy

platform/ios/Readme_5.1.0.txt platform/ios/Readme_qt5.txtplatform/ios/Readme_5.1.0.txt renamed to platform/ios/Readme_qt5.txt

@@ -0,0 +1,8 @@
+{
+  'variables': {
+    'QT5': '1', # change to '1' for enabling Qt5
+    'QT_INC_PATH':    '/usr/local/opt/qt5_ios/include',
+    'QT_LIB_PATH':    '/usr/local/opt/qt5_ios/lib',
+    'QT_BIN_PATH':    '/usr/local/opt/qt5_ios/bin',
+  },
+}