libxslt: Convert to BBCLASSEXTEND

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

meta/packages/libxslt/libxslt-native_1.1.22.bb

@@ -1,4 +0,0 @@
-require libxslt_${PV}.bb
-inherit native
-
-DEPENDS = "libxml2-native (>=2.6.27)"

meta/packages/libxslt/libxslt_1.1.22.bb

@@ -17,3 +17,5 @@ PACKAGES = "${PN}-dbg ${PN}-dev ${PN}-utils ${PN} ${PN}-doc ${PN}-locale"
 
 FILES_${PN}-dev += "${bindir}/xslt-config"
 FILES_${PN}-utils += "${bindir}"
+
+BBCLASSEXTEND = "native"