PiBox

1. KERNEL_CFG includes the GIT_ID. It shouldn't.
2. KERNEL_CONFIG checks for KERNEL_CFG, can't find it, so uses KERNEL_DEFCONFIG.
3. kernel-saveconfig saves to KERNEL_CONFIG

1. KERNEL_CFG should not include GIT_ID.
2. KERNEL_CONFIG is okay as it is
3. kernel-saveconfig save to KERNEL_CFG

The saving of the .config from the kernel build tree should go to the config file we want, not the one we're using since the one we're using may just be a fallback if the one we want didn't exist yet. After we've built and modified from the defconfig we want to save to the file we will use in later builds, which will be KERNEL_CFG.

I removed the git id from KERNEL_CFG.
I made saveconfig use KERNEL_CFG.
Then I changed the name of KERNEL_CFG to KERNEL_SAVECFG to make it a little more obvious what the variable is used for compared to KERNEL_CONFIG and KERNEL_DEFCONFIG.

These are checked in but not pushed. I'm retesting the kernel build because I changed the name of the saved 3.10.y kernel config to match KERNEL_SAVECFG and saved and updated kernel configuration to it (related to RM #287). I want to make sure I didn't muck up the config while doing all this name changing.

Verified working and all changes pushed upstream. This issue can be closed.