Strip ODM_MANIFEST_SKUS

Otherwise it gets a different value when using starlark
board config, causing the ninja files to differ.

Bug: 201700692
Test: ./build/bazel/ci/rbc_regression_test.sh -b aosp_crosshatch_car-userdebug
Change-Id: I55870f031b779202db720f10d7d502f9d868e1f6
diff --git a/core/board_config.mk b/core/board_config.mk
index 821607e..6bbb3a0 100644
--- a/core/board_config.mk
+++ b/core/board_config.mk
@@ -159,6 +159,7 @@
 _board_strip_list += BOARD_GKI_SIGNING_KEY_PATH
 _board_strip_list += BOARD_MKBOOTIMG_ARGS
 _board_strip_list += BOARD_VENDOR_BOOTIMAGE_PARTITION_SIZE
+_board_strip_list += ODM_MANIFEST_SKUS
 
 
 _build_broken_var_list := \