(SHIFT) envsetup: call check_product to satisfy lineage build system

Change-Id: Ic8833ab98f9ea2e701ced4cc800e1f5e5405073f
Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>
diff --git a/envsetup.sh b/envsetup.sh
index 7871417..afe41d5 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -495,6 +495,9 @@
         return 1
     fi
 
+    # Populate LINEAGE_BUILD
+    check_product $product $release
+
     _lunch_meat $product $release $variant
 }