Add build_* meta files to allowlist in Dangling rules check

Both `m` and `m --soong-only` generates these files from soong_ui and
not from the primary ninja execution. build/make/core/main.mk then
creates an empty rule to prevent the dangling rule check.

In preparation for turning on "test for dangling rules" in m
--soong-only, add these files to the allowlist

Test: m checkbuild --soong-only
Bug: 394096939
Change-Id: Id702e5753c9892f87e3cf043e51ed86fb5a33862