buildhistory: fix "version went backwards" QA error message

Fix parentheses placement in the message from:
Package version for package X went backwards which would break package feeds from (Y to Z)
to this one:
Package version for package X went backwards which would break package feeds (from Y to Z)

Signed-off-by: Denys Dmytriyenko <denys@ti.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>