Don't include the build number in `toybox --version`.

This adds undesired noise to OTA packages, and isn't worth that cost.

Bug: http://b/63513984
Test: toybox --version

(cherry picked from commit bf4741d56c55172ffbeffdf21b8d2e5ff5916991)

Change-Id: I4cefb27954c708f06df70bc1874f19927ba16801
1 file changed