pkg/54548: Update GNU Aspell to 0.60.7

[iku.iwasa%gmail.com@localhost]

>Number:         54548
>Category:       pkg
>Synopsis:       Update GNU Aspell to 0.60.7
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Sun Sep 15 06:30:00 +0000 2019
>Originator:     Iku Iwasa
>Release:        pkgsrc git master (2ab6419ff4e)
>Organization:
>Environment:
NetBSD 9.99.10 amd64
>Description:
GNU Aspell 0.60.7 was released at July 2019, and looks now actively developed after several years inactivity period.

Here is the changelog.
http://aspell.net/man-html/ChangeLog.html#Changes-from-0_002e60_002e6_002e1-to-0_002e60_002e7-_0028July-29_002c-2019_0029
>How-To-Repeat:

>Fix:
Here is minimal diff to build aspell-0.60.7 on NetBSD/amd64.

https://gist.github.com/iquiw/18aeaef90d4fa7f820acdb58b98ccf90