Revert "qcanobserver: Move to nonworking"

* Use PNBLACKLIST instead

This reverts commit 8040a4c38b.

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-qt/qcanobserver/qcanobserver-socketcan_svn.bb

@@ -28,3 +28,4 @@ do_install() {
 FILES_${PN} += "${datadir}/qcanobserver/lib"
 FILES_${PN}-dbg += "${datadir}/qcanobserver/lib/.debug"
 
+PNBLACKLIST[qcanobserver-socketcan] ?= "depends on qwt-5 APIs"

meta-oe/recipes-qt/qcanobserver/qcanobserver_svn.bb

@@ -39,3 +39,5 @@ do_install() {
 }
 
 FILES_${PN}-dbg += "${datadir}/qcanobserver/.debug"
+
+PNBLACKLIST[qcanobserver] ?= "depends on qwt-5 APIs"