Implement a workaround for thread_local on aarch64

Some versions of lld break thread_local on aarch64. There's a
minimally-painful workaround for it, so let's apply that.

Change-Id: I706de9e280cc15006e5767ee10d961cb2d99352c
diff --git a/aos/ipc_lib/BUILD b/aos/ipc_lib/BUILD
index fed9a8a..6ee8ab4 100644
--- a/aos/ipc_lib/BUILD
+++ b/aos/ipc_lib/BUILD
@@ -12,6 +12,7 @@
     visibility = ["//visibility:public"],
     deps = [
         "//aos:macros",
+        "//aos:thread_local",
         "//aos/util:compiler_memory_barrier",
         "@com_github_google_glog//:glog",
         "@com_google_absl//absl/base",