avrdude: fix build for other arch

* thnx fbrosson

dev-embedded/avrdude/avrdude-6.3.recipe

@@ -5,7 +5,7 @@ technique (ISP)."
 HOMEPAGE="http://www.nongnu.org/avrdude/"
 COPYRIGHT="2003-2016 Brian S. Dean"
 LICENSE="GNU GPL v2"
-REVISION="2"
+REVISION="3"
 SOURCE_URI="http://download.savannah.gnu.org/releases/avrdude/avrdude-$portVersion.tar.gz"
 CHECKSUM_SHA256="0f9f731b6394ca7795b88359689a7fa1fba818c6e1d962513eb28da670e0a196"
 PATCHES="avrdude-$portVersion.patchset"
@@ -51,8 +51,8 @@ BUILD()
 {
 	autoreconf -fi
 	libtoolize --force --copy --install
-	if [ "$effectiveTargetArchitecture" == x86 ]; then
-		export PKG_CONFIG_LIBDIR=/system/develop/lib/x86/pkgconfig/
+	if [ -n "$secondaryArchSuffix" ]; then
+		export PKG_CONFIG_LIBDIR=/system/$relativeDevelopLibDir/pkgconfig/
 	fi
 	automake --add-missing
 	runConfigure ./configure