Update to 3.15-rc1.
    - Xen is disabled.
    - ARM is disabled.
    - Eliminated 3 patches.
    - Config changes:
      - Generic config options:
        * USELIB=y (default) - only used for libc5 users, do we care?
        * SYSFS_SYSCALL=y (default) - libc doesn't even supported it anymore,
    				  do we care?
        * ACPI_REDUCED_HARDWARE_ONLY=n (default)
        * CGROUP_NET_PRIO=y (new feature, do we want it?)
        * LOCK_TORTURE_TEST=n (default)
        * EVM=n (default)
    
      - New options for existing drivers:
        * BATMAN_ADV_MCAST=y (default=n) -- optimization w/ better reliability
        * BT_6LOWPAN=y (default=n) -- new feature
        * MTD_UBI_BLOCK=n (default -- do we even care about UBI?)
        * ZRAM_LZ4_COMPRESS=y (new feature)
        * BE2NET_VXLAN=y (default)
        * MLX4_EN_VXLAN=y (default)
        * QLCNIC_VXLAN=y (default=n) - enabled for other drivers
        * IWLWIFI_BCAST_FILTERING=n (default)
    
      - New modules:
        * IP_SET_HASH_IPMARK
        * INTEL_MEI_TXE
        * DM_ERA
        * ALTERA_TSE
        * RTL8723BE
        * RSI_91X
           - RSI_DEBUGFS=n
           - RSI_SDIO=m
           - RSI_USB=m
        * INPUT_PWM_BEEPER
        * SENSORS_LTC2945
        * SENSORS_LTC4222
        * SENSORS_LTC4260
        * SENSORS_ADC128D818
        * MFD_RTSX_USB
        * IR_SHARP_DECODER
        * IR_IMG
           - IR_IMG_RAW=n (documented as performance degrading and for debugging)
           - IR_IMG_NEC=y
           - IR_IMG_JVC=y
           - IR_IMG_SONY=y
           - IR_IMG_SHARP=y
           - IR_IMG_SANYO=y
        * DRM_PTN3460
        * USB_UAS
        * DVB_RTL2832_SDR (USB)
        * ALIENWARE_WMI
        * PWM_LPSS
        * SUNRPC_XPRT_RDMA_CLIENT=m (default)
        * SUNRPC_XPRT_RDMA_SERVER=m (default)
    
      - x86_64:
        * EFI_MIXED=n (default) -- do we use a bootloader that can support it?
    
      - ppc/ppc64le:
        * HV_PERF_CTRS=y (default)
        * POWERNV_CPUFREQ=y (default)
    
      - Probably ARM but looks generic, all modules:
        * SPMI
        * GPIO_DWAPB
        * HID_CP2112
        * MFD_TPS65218
        * GPIO_SYSCON (depends on MFD_SYSCON, which looks to be only used by ARM)
    
      - New options specific to ARM (I think), all disabled:
        * IMX_THERMAL
        * AHCI_IMX
        * PWM_FSL_FTM
        * OMAP_CONTROL_PHY
        * PHY_SAMSUNG_USB2
        * FSL_EDMA
        * XILINX_WATCHDOG
        * GS_FPGABOOT
        * BCMGENET
        * SXGBE_ETH
        * MFD_BCM590XX
        * BCM7XXX_PHY
    
      - New options specific to tablets, all disabled:
        * INPUT_SOC_BUTTON_ARRAY (windows tablet)
        * R8723AU (Lenovo Yogi)
    
      - Other weird hardware:
        * CONFIG_MCB=n (specific to MEN Mikroelektronik FGPA devices)
    
      - Changes undocumented here were changed automatically.