Restore "Check if current ld.config.txt files is backward compatible"

This reverts commit bd2b0c78a1cead7a77bd7a4ec577344ce7e1bb1a.

Reason for revert:
Solved the build error on mac_sdk build by using python2

Bug: 112738739
Bug: 111417344
Test: make ld.config.txt

Change-Id: Ic5a3ed2e6b091813c0310f859b7d20935514a7c6
diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index 07f0797..b68dc34 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -206,6 +206,7 @@
 LOCAL_MODULE_STEM := $(call append_vndk_version,$(LOCAL_MODULE))
 include $(BUILD_SYSTEM)/base_rules.mk
 ld_config_template := $(LOCAL_PATH)/etc/ld.config.txt
+check_backward_compatibility := true
 vndk_version := $(PLATFORM_VNDK_VERSION)
 include $(LOCAL_PATH)/update_and_install_ld_config.mk
 
@@ -243,6 +244,7 @@
 LOCAL_MODULE_STEM := $$(LOCAL_MODULE)
 include $(BUILD_SYSTEM)/base_rules.mk
 ld_config_template := $(LOCAL_PATH)/etc/ld.config.txt
+check_backward_compatibility := true
 vndk_version := $(1)
 lib_list_from_prebuilts := true
 include $(LOCAL_PATH)/update_and_install_ld_config.mk