Allow factory specific kernel commandline
Allow factory specific kernel commandline

* BOARD_KERNEL_CMDLINE_FACTORY_BOOT can be set to
add kernel commandline items to the factory ramdisk,
such as fiq_debugger.console_enable=Y

Change-Id: Iee4060b96eaeecc517975c56342fd5445b1feabf
Signed-off-by: Nick Sanders <f4566bb3c90c0bf5fa0906b296b1da45051a62ee@google.com>

see4ri/lolili,fallouttester/platform_manifest,xorware/android_build,xorware/android_build,RR-msm7x30/platform_manifest,knone1/platform_manifest,pranav01/platform_manifest,hagar006/platform_manifest,Hybrid-Power/startsync,xorware/android_build,ND-3500/platform_manifest,xorware/android_build,xorware/android_build