libxml-parser-perl: fix install bug

This patch makes libxml-parser-perl behave on my system - though it looks
like it isn't necessary on all host OSses (on gentoo and opensuse it works
without, but on ubuntu lucid and Scientific 6 it fails without the patch).

Signed-off-by: Heiko Helmle <helman@gmx.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/libxml-parser-perl/libxml-parser-perl.mk

@@ -18,6 +18,7 @@ define HOST_LIBXML_PARSER_PERL_CONFIGURE_CMDS
         EXPATINCPATH=$(HOST_DIR)/usr/include \
         INSTALLDIRS=site \
         INSTALLSITELIB=$(HOST_DIR)/usr/lib/perl \
+        INSTALLSITEARCH=$(HOST_DIR)/usr/lib/perl \
  )
 endef