Port bug 774572 - Define JAR_MANIFESTS in moz.build files - to fix bustage. rs=build-system-peer-port.
Port bug 926900 - Remove msys-make specific mozconfig. rs=build-system peer port.
Port bug Bug 944813 - Fix test-package-step after bug 926906. rs=build-system-peer-port.
Port bug Bug 944813 - Fix test-package-step after bug 926906. rs=build-system-peer-port. CLOSED TREE