merge cm changes
sf: workaround for swapBuffers bug on Exynos4
add BOARD_EGL_NEEDS_LEGACY_FB

DisplayDevice: Backwards compatibility with old EGL From 4.1 to 4.2, the
display subsystem was reworked to use SurfaceTextureClient/BufferQueue
instead of FramebufferNativeWindow for the framebuffer itself.
Unfortunately, some legacy EGL libraries make assumptions that any
framebuffer device will be FramebufferNativeWindow. These EGL libraries
will fail when used in 4.2 as if the framebuffer is not
FramebufferNativeWindow, they will try to dequeue more than one buffer
at a time, which will cause a hang of the graphics subsystem. This
allows use of FramebufferNativeWindow to keep legacy EGL implementations
happy. Confirmed EGL implementations that need this include but are not
limited to: Set BOARD_EGL_NEEDS_LEGACY_FB to use Tegra2/3 ICS EGL
Mali400 ICS EGL (Allwinner A10) Mali400 Jellybean (4.1) EGL (Samsung
Exynos4) Original implementation by OndraOrg of XDA: http://forum.xda-
developers.com/showpost.php?p=34469675&postcount=19
added BOARD_EGL_WORKAROUND_BUG_10194508