Add architecture specific library name

This will allow to create the architecture library path like
`/usr/lib/arm-linux-gnueabihf/`.

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

update-test-path

@@ -6,9 +6,9 @@ PATH=${TESTPATH}/common:${TESTPATH}/bin:$PATH
 
 # Path for architecture specific binaries
 case `uname -m` in
-x86_64)  ARCHDIR=amd64 ;;
-armv7l)  ARCHDIR=armhf ;;
-aarch64) ARCHDIR=arm64 ;;
+x86_64)  ARCHDIR=amd64 ; ARCHLIBDIR=x86_64-linux-gnu ;;
+armv7l)  ARCHDIR=armhf ; ARCHLIBDIR=arm-linux-gnueabihf ;;
+aarch64) ARCHDIR=arm64 ; ARCHLIBDIR=aarch64-linux-gnu ;;
 esac
 
 PATH=${TESTPATH}/${ARCHDIR}/bin:$PATH