Fix some find modules not setting _FOUND variable

If the target exists or the find_package() call succeeds
we still need to set _FOUND to 1.

Change-Id: Ib2267c30580082dcc177ab21708a3bc5dbde974f
Reviewed-by: Albert Astals Cid <albert.astals.cid@kdab.com>
Reviewed-by: Qt CMake Build Bot

cmake/FindWrapDBus1.cmake

@@ -29,3 +29,7 @@ if(DEFINED __qt_dbus_pcl)
 else()
     unset(ENV{PKG_CONFIG_LIBDIR})
 endif()
+
+if(DBus1_FOUND)
+    set(WrapDBus1_FOUND 1)
+endif()

cmake/FindXRender.cmake

@@ -6,4 +6,6 @@ if(NOT TARGET PkgConfig::XRender)
     if (NOT TARGET PkgConfig::XRender)
         set(XRender_FOUND 0)
     endif()
+else()
+    set(XRender_FOUND 1)
 endif()