hg: bsd-port/jdk8/jdk: Restore bsd specific iconv make flags lost in merge conflict.

[kurt at intricatesoftware.com]

Changeset: c8bb92cfa42d
Author:    Kurt Miller <kurt at intricatesoftware.com>
Date:      2019-02-11 09:23 -0500
URL:       http://hg.openjdk.java.net/bsd-port/jdk8/jdk/rev/c8bb92cfa42d

Restore bsd specific iconv make flags lost in merge conflict.

! make/lib/Awt2dLibraries.gmk