pkg_install: carry over a commit from the src tree

Module Name:    src
Committed By:  christos
Date:          Mon Sep  7 00:36:53 UTC 2020

Modified Files:
        src/external/bsd/pkg_install/dist/lib: plist.c

Log Message:
Avoid strict aliasing issue by using a separate buffer..

To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/external/bsd/pkg_install/dist/lib/plist.c

(wiz)