capnproto: -devel: add dependency on main pkg

Closes #7368

srcpkgs/capnproto/template

@@ -1,7 +1,7 @@
 # Template file for 'capnproto'
 pkgname=capnproto
 version=0.6.1
-revision=2
+revision=3
 wrksrc="${pkgname}-c++-${version}"
 build_style=gnu-configure
 short_desc="Cap'n Proto serialization/RPC system"
@@ -18,6 +18,7 @@ post_install() {
 
 capnproto-devel_package() {
 	short_desc+=" - development files"
+	depends="${sourcepkg}>=${version}_${revision}"
 	pkg_install() {
 		vmove usr/include
 		vmove usr/lib/*.a