TARGET_FS_CONFIG_GEN is a list, not a single path

Bug: 130787336
Test: m oemaids_header_gen oemaids_headers passwd group
Test: Set TARGET_FS_CONFIG_GEN to a list of paths
Change-Id: I5186b378fea8865f46cfd891420ba576f36e2565
diff --git a/core/soong_config.mk b/core/soong_config.mk
index c01fc98..46e026a 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -165,7 +165,7 @@
 $(call add_json_list, ProductHiddenAPIStubsSystem,       $(PRODUCT_HIDDENAPI_STUBS_SYSTEM))
 $(call add_json_list, ProductHiddenAPIStubsTest,         $(PRODUCT_HIDDENAPI_STUBS_TEST))
 
-$(call add_json_str,  TargetFSConfigGen,                 $(TARGET_FS_CONFIG_GEN))
+$(call add_json_list, TargetFSConfigGen,                 $(TARGET_FS_CONFIG_GEN))
 
 $(call add_json_map, VendorVars)
 $(foreach namespace,$(SOONG_CONFIG_NAMESPACES),\