graphics/pstoedit: Fix make check-plist error

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

> Parsing plist

> Checking for items in STAGEDIR missing from pkg-plist

Error: Orphaned: man/man1/pstoedit.1.gz

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

> Error: Plist issues found.

• Error code 1

Approved by: portmgr (just fix it)