ffmpeg: Bump to 2.2-Helix-alpha2 - rebased on 2.2.4
Fixed mapping for xbmc command "eject" for device "devinput" (KEY_EJECT
not defined in linux/usr/include/input.h but KEY_EJECTCD and KEY_EJECTCLOSECD).
Merge pull request #4979 from ksooo/fix-lircmap-eject-key-bindings

Fixed mapping for xbmc command "eject" for device "devinput".
ActiveAE: request best matching 5.1 layout from sink
Merge pull request #4938 from FernetMenta/channels

ActiveAE: request best matching 5.1 layout from sink
Merge pull request #4945 from fritsch/ffmpeg-2.2-helix-alpha2

ffmpeg: Bump to 2.2-Helix-alpha2 - rebased on 2.2.4
[win32] Win32SMBDirectory: fix network enumeration on Win8.1 Update 1
Thanks @Voyager1 for report
fixed: use the proper make instead of calling 'make' directly

fixes builds on freebsd
cmake buildsystem
add tests needed by new u16 string stuff
wrap cmyth properly
move some more install related stuff to install script
move all install code to platform install script
allow building without doxygen
fix building with yajl2
generate scripts in a subdir to avoid problems configuring in top dir
properly wrap library.xbmc.foo
link to threading lib
remove duplicate mpeg2 entry
properly locate java and swig

also use the detected paths for java, swig and doxygen