Call SetShmBase() in init_rs

The ShmEventLoop rust test was using /dev/shm/aos and breaking out of
the sandbox. Fix that.

Change-Id: I14db8b500a03a66fef41399c4cea334ff79b217f
Signed-off-by: James Kuszmaul <james.kuszmaul@bluerivertech.com>
diff --git a/aos/ipc_lib/BUILD b/aos/ipc_lib/BUILD
index 53d30cd..471b75d 100644
--- a/aos/ipc_lib/BUILD
+++ b/aos/ipc_lib/BUILD
@@ -404,3 +404,14 @@
         "shm_observers.h",
     ],
 )
+
+cc_library(
+    name = "shm_base",
+    srcs = ["shm_base.cc"],
+    hdrs = ["shm_base.h"],
+    target_compatible_with = ["@platforms//os:linux"],
+    visibility = ["//visibility:public"],
+    deps = [
+        "@com_github_gflags_gflags//:gflags",
+    ],
+)