Update external projects to 4.2.2_r1.2 :

external/easymock
external/embunit
external/emma
external/esd
external/expat

Change-Id: I0650e9f0a3ea4430f6bb4c4864f2f62a59dd4681
Default revision refs/tags/android-4.2.2_r1.2

Change-Id: Ic585cb634d93f8072f1e1b9b0ed8bf0103c0bdae