Bug 960811 - enable synthetic APKs by default in Fennec builds; r=mfinkle

CLOBBER

@@ -22,4 +22,4 @@
 # changes to stick? As of bug 928195, this shouldn't be necessary! Please
 # don't change CLOBBER for WebIDL changes any more.
 
-Bug 957070 requires a clobber to resolve a reference to a program class member.
+bug 960811 - clobber to rebuild preprocessed files when enabling synthetic APKs

mobile/android/confvars.sh

@@ -65,3 +65,6 @@ fi
 
 # Enable the production cert for verifying signed packaged apps.
 MOZ_B2G_CERTDATA=1
+
+# Enable the "synthetic APKs" implementation of Open Web Apps.
+MOZ_ANDROID_SYNTHAPKS=1