jenkins: fix war file handling

- add create_wrksrc=yes
- add empty do_extract() to skip war extraction
- fix vinstall path

srcpkgs/jenkins/template

@@ -2,6 +2,7 @@
 pkgname=jenkins
 version=2.492.3
 revision=1
+create_wrksrc=yes
 make_dirs="/var/lib/jenkins 0755 jenkins jenkins"
 depends="virtual?java-runtime"
 short_desc="Open source automation server"
@@ -15,8 +16,12 @@ system_accounts="jenkins"
 jenkins_homedir="/var/lib/jenkins"
 jenkins_descr="Jenkins server user"
 
+do_extract() {
+	:
+}
+
 do_install() {
-	vinstall jenkins.war 644 opt/jenkins
+	vinstall ${XBPS_SRCDISTDIR}/${pkgname}-${version}/jenkins.war 644 opt/jenkins
 	vsv jenkins
 	vlicense ${FILESDIR}/LICENSE
 }