dev-libs/xerces-c: support Prefix.

Prefixify the environment variable XERCESC_NLS_HOME.

Package-Manager: Portage-2.3.28, Repoman-2.3.9

dev-libs/xerces-c/xerces-c-3.1.4-r1.ebuild

@@ -1,12 +1,12 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 1999-2018 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
 
-inherit autotools
+inherit autotools prefix
 
 DESCRIPTION="A validating XML parser written in a portable subset of C++"
-HOMEPAGE="http://xerces.apache.org/xerces-c/"
+HOMEPAGE="https://xerces.apache.org/xerces-c/"
 SRC_URI="mirror://apache/xerces/c/3/sources/${P}.tar.gz"
 
 LICENSE="Apache-2.0"
@@ -111,6 +111,6 @@ src_install () {
 	# To make sure an appropriate NLS msg file is around when using
 	# the iconv msgloader ICU has the messages compiled in.
 	if use iconv && ! use icu; then
-		doenvd "${FILESDIR}/50xerces-c"
+		doenvd "$(prefixify_ro "${FILESDIR}/50xerces-c")"
 	fi
 }