Add TARGET_BUILD_UNBUNDLED as a variable to control builds.

Test: m droid
Test: TH, in particular builds green on ub-launcher3-master
Bug: 157549171
Change-Id: Ifc5b2759c10672e4b253ddd208b02e5af17e8dad
diff --git a/ui/build/dumpvars.go b/ui/build/dumpvars.go
index a559330..5c8d30e 100644
--- a/ui/build/dumpvars.go
+++ b/ui/build/dumpvars.go
@@ -142,6 +142,7 @@
 	"TARGET_BUILD_VARIANT",
 	"TARGET_BUILD_TYPE",
 	"TARGET_BUILD_APPS",
+	"TARGET_BUILD_UNBUNDLED",
 	"TARGET_ARCH",
 	"TARGET_ARCH_VARIANT",
 	"TARGET_CPU_VARIANT",
@@ -186,6 +187,7 @@
 		"TARGET_PRODUCT",
 		"TARGET_BUILD_VARIANT",
 		"TARGET_BUILD_APPS",
+		"TARGET_BUILD_UNBUNDLED",
 
 		// compiler wrappers set up by make
 		"CC_WRAPPER",