deploy.py: support adding a build id.

Add support for passing and injecting a build ID to the souces prior to
compiling. Allows to easily create rebuilds of Rockbox Utility without creating
false positives on update detection.
Fix a typo in version.h. Thanks to sideral for noting.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29825 a1c6a512-1295-4272-9138-f99709370657
3 files changed