Truncate version string to 32 characters

The version struct and EC_CMD_GET_VERSION assume 32-character version
strings.  But if the git tree is dirty and the board name is long, the
version string overflows that limit.

This change truncates what's stored in the version string to fit.

The build info still contains the full version string, as it did before.

BUG=chrome-os-partner:21156
BRANCH=none
TEST=build BOARD=mccroskey with a dirty tree; it should build.
     Then cat build/mccroskey/ec_version.h to see CROS_EC_VERSION32 has
     truncated the version string.  Then build a platform of your choice
     and type 'version' to see that the version string and build info is
     still reported correctly.

Change-Id: Ie71b8efd99a83315f8b4d5ad10c51e48781b12f4
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/62649
Reviewed-by: Bill Richardson <wfrichar@chromium.org>

0 files changed, 0 insertions, 0 deletions