fstab: Add fake boot partition

Needed to complete the build without using custom releasetools

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>
Remove releasetools

No need to have all this duplicate code when we can override
non-writable boot partition with a single line fstab addition

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>
msm7x30: Disable /boot mount & format in CWM
msm7x30: Add releasetools extensions

Used to remove boot.img flashing from the updater script,
since boot partition is only writable through fastboot