su: update su to version 2.40
Release tag: 5.4 stable
ehci-s5p: fix section mismatch in EHCI USB host drivers if compiling for arm
mali: fix compile error in new mali400 drivers if subversion > v1.7.3 is installed
toolchain: GCC 4.8+ compatibility (in memset.S) and changes for Linaro toolchain
toolchain: switch to Linaro 4.9.1-2014.07 ( + optimized compiler flags and fixed kernel version information)
toolchain: switch to Linaro 4.9.2-2014.08 ( + additional flags for -o3 optimization)
toolchain: switch to Linaro 4.9.2-2014.09
toolchain: change directoy naming due to build script changes
boeffla_defconfig: switch to LZMA compression for kernel/ramdisk to reduce image size
toolchain: switch from -O3 to -Ofast
toolchain: switch to Linaro 4.9.3-2014.11