math/qhull: Fix stage-qa after 6db564e9a16951384daf415e1323e71f71693316

> Running Q/A tests (stage-qa)

> Checking for pkg-plist issues (check-plist)

> Parsing plist

> Checking for items in STAGEDIR missing from pkg-plist

Error: Orphaned: lib/cmake/Qhull/QhullTargets-%%CMAKE_BUILD_TYPE%%.cmake

> Checking for items in pkg-plist which are not in STAGEDIR

> Error: Plist issues found.

• Error code 1

Stop.
make: stopped in /usr/ports/math/qhull

>> Error: check-plist failures detected

Approved by: portmgr (blanket)