Allow bootstrap bionic only to init, ueventd, and apexd

The bootstrap bionic (/system/lib/bootstrap/*) are only to the early
processes that are executed before the bionic libraries become available
via the runtime APEX. Allowing them to other processes is not needed and
sometimes causes a problem like b/123183824.

Bug: 123183824
Test: device boots to the UI
Test: atest CtsJniTestCases:android.jni.cts.JniStaticTest#test_linker_namespaces
Change-Id: Id7bba2e8ed1c9faf6aa85dbbdd89add04826b160
diff --git a/private/file_contexts b/private/file_contexts
index c8c881d..7cbb623 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -180,6 +180,7 @@
 #
 /system(/.*)?		u:object_r:system_file:s0
 /system/lib(64)?(/.*)?		u:object_r:system_lib_file:s0
+/system/lib(64)?/bootstrap(/.*)? u:object_r:system_bootstrap_lib_file:s0
 /system/bin/atrace	u:object_r:atrace_exec:s0
 /system/bin/ashmemd	u:object_r:ashmemd_exec:s0
 /system/bin/auditctl	u:object_r:auditctl_exec:s0