Add CMake build system

Add CMake build system for libraries, tests and samples
update_files.py converts build/files into CMake format.
build/update-setup-h has been modified to update build/cmake/setup.h.in.

build/cmake/lib/media/CMakeLists.txt

@@ -0,0 +1,36 @@
+#############################################################################
+# Name:        build/cmake/lib/media/CMakeLists.txt
+# Purpose:     CMake file for media library
+# Author:      Tobias Taschner
+# Created:     2016-10-03
+# Copyright:   (c) 2016 wxWidgets development team
+# Licence:     wxWindows licence
+#############################################################################
+
+include(../../source_groups.cmake)
+
+wx_append_sources(MEDIA_FILES MEDIA_CMN)
+
+if(WXMSW)
+    wx_append_sources(MEDIA_FILES MEDIA_MSW)
+elseif(WXOSX_COCOA)
+    wx_append_sources(MEDIA_FILES MEDIA_OSX_COCOA)
+elseif(UNIX)
+    wx_append_sources(MEDIA_FILES MEDIA_UNIX)
+endif()
+
+wx_add_library(media ${MEDIA_FILES})
+if(WXOSX_COCOA)
+    # TODO: add version detection of some kind and/or wx_option
+    wx_lib_compile_definitions(media PRIVATE -DwxOSX_USE_QTKIT=0)
+    wx_lib_link_libraries(media PUBLIC
+        "-framework AVFoundation"
+        "-framework AVKit"
+        "-framework CoreMedia"
+        )
+elseif(UNIX)
+    wx_lib_include_directories(media PUBLIC ${GSTREAMER_INCLUDE_DIRS})
+    wx_lib_link_libraries(media PUBLIC ${GSTREAMER_LIBRARIES})
+endif()
+
+wx_finalize_lib(media)