pkg/52035: Update lang/guile20

[juraj%lutter.sk@localhost]

>Number:         52035
>Category:       pkg
>Synopsis:       Update lang/guile20
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 06 09:30:00 +0000 2017
>Originator:     Juraj Lutter
>Release:        pkgsrc-master
>Organization:
>Environment:
SmartOS
>Description:
mkostemp() fails on SmartOS when O_APPEND flag is not passed.
>How-To-Repeat:
Build lang/guile20
>Fix:
Apply the following patch:

https://pkg.nic.sk/pkgsrc/patches/lang/guile20/guile20.patch