follow up fix for backport: system-packages from the JVM for export

[gireeshpunathil]

• add a missing comma in the manifest

this is a suprise to me, as both the local builds did not catch this. Or is it that the comma was removed inadvertently, later on? :(

• bump the bundle version due to the change (we missed it last time)

Refs: https://github.com/eclipse-pde/eclipse.pde.build/pull/16