Log Message:
Set BUILDLINK_DEPMETHOD.qt3-tools= build
and bump PKGREVISION.

This is for PR #31852.

objdump showed me that it didn't use qt3-tools libraries.
And it appeared to start up fine without it.
Also, the PR submitter said he could run scribus without the
qt3-tools installed.

(Maybe this should be set in x11/qt3-tools/buildlink3.mk?)