Bug 590575 - Deselecting optional components in SeaMonkey installer does not work, r=khuey, a=NPOTB

toolkit/mozapps/installer/packager.mk

@@ -410,6 +410,7 @@ ifdef MOZ_OPTIONAL_PKG_LIST
 	  "$(call core_abspath,$(DEPTH)/installer-stage/optional)", \
 	  "$(MOZ_PKG_MANIFEST)", "$(PKGCP_OS)", 1, 0, 1 \
 	  $(foreach pkg,$(MOZ_OPTIONAL_PKG_LIST),$(PKG_ARG)) )
+	@cd $(DEPTH)/installer-stage/optional/extensions; find -maxdepth 1 -mindepth 1 -exec rm -r ../../core/extensions/{} \;
 endif
 
 stage-package: $(MOZ_PKG_MANIFEST) $(MOZ_PKG_REMOVALS_GEN)