[rbp/omxplayer] Fix for hang following seek after eos

If you seek after the demuxer eof, the eof state is cleared, but we are not clearing the flags relating to sending eos stream to audio/video players
[libdvdread] Revert previous fixups
[libdvdread] Remove symlink checking as this is not needed by xbmc
[libdvdread] added patch file elimination of symlink resolution
[libdvdread] add missing stat() filesystem wrapper - fixes reading VIDEO_TS dvds on Android
Merge pull request #2753 from Voyager1/libdvdread-fix

Better Libdvdread fix for SMB/NFS VIDEO_TS dvd files (non-Windows and now including Android) with special thanks to @theuni !
CGUIWindowSettingsCategory: remove unused m_currentSettings member variable
CGUIWindowSettingsCategory: only handle delayed settings during GUI_MSG_FOCUSED if the focused setting is not the delayed setting

When using a mouse to control XBMC changing the value of a spinner with a left
click results in a GUI_MSG_FOCUSED message. If that setting is delayed a left
click lead to the early evaluation of the delayed setting even though it's
still being changed (which should just result in a reset of the delay timer).
This lead to crashes if a setting changed callback executed a skin reload.
build: don't guess where a feature may be available

Test the feature, not the OS. Fixes Android build.
Merge pull request #2755 from popcornmix/hang_eos_seek

[rbp/omxplayer] Fix for hang following seek after eos
VideoRenerers: add buffering
add buffering for GLES
WinRenderer: add buffering
DXVA: activate buffering in renderer
linuxrenderer: delete all textures on reconfigure
drop frame counter in application, ask render manager instead
vaapi: adopt to buffering in renderer
add buffering - some documentation
move NUM_BUFFERS up to BaseRenderer.h
OverlayRenderer: align buffers with index in renderManager