Include the upstream toybox version in "toybox --version".

SHAs have their uses, but upstream version numbers are better for getting
a quick ballpark figure for the version.

Before:
  afc66714a4e3-android

After:
  0.7.0-afc66714a4e3-android

(cherry picked from commit 35c9c63120a40f4cfe119f5670d914ac5e69c0f6)

Change-Id: I631b220135560023aa114d2fd6c324633afb8dcc
1 file changed