openjade-native: Set datadir explicitly

datadir was previously defaulting to usr/share and hence could not
find openjade's data files.

Signed-off-by: Scott Garman <scott.a.garman@intel.com>

meta/recipes-devtools/openjade/openjade-native_1.3.2.bb

@@ -7,7 +7,7 @@ SECTION = "base"
 LICENSE = "BSD"
 LIC_FILES_CHKSUM = "file://COPYING;md5=641ff1e4511f0a87044ad42f87cb1045"
 
-PR = "r0"
+PR = "r1"
 
 DEPENDS = "opensp-native sgml-common-native"
 RDEPENDS_${PN} = "sgml-common"
@@ -23,6 +23,10 @@ inherit autotools native
 EXTRA_OECONF = "--enable-spincludedir=${STAGING_INCDIR}/OpenSP \
                 --enable-splibdir=${STAGING_LIBDIR}"
 
+# We need to set datadir explicitly, but adding it to EXTRA_OECONF
+# results in it being specified twice when configure is run.
+CONFIGUREOPTS := "${@d.getVar('CONFIGUREOPTS', True).replace('--datadir=${datadir}', '--datadir=${STAGING_DATADIR}/sgml/openjade-${PV}')}"
+
 CFLAGS =+ "-I${S}/include"
 
 do_install() {