security/krb5-1*: Fix plist error

Fix:

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

> Parsing plist

> Checking for items in STAGEDIR missing from pkg-plist

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

Error: Missing: @dir %%DOCSDIR%%

> Error: Plist issues found.

• Error code 1