Add type for /system/bin/tcpdump.

We add this type with the intent to expose /system/bin/tcpdump to
vendor on userdebug devices only.

Bug: 111243627
Test: device boots /system/bin/tcpdump correctly labeled as
tcpdump_exec, can browse internet, turn wifi on/off
Change-Id: Icb35e84c87120d198fbb2b44edfa5edf6021d0f0
diff --git a/private/compat/28.0/28.0.cil b/private/compat/28.0/28.0.cil
index e84c3ad..e76bc2d 100644
--- a/private/compat/28.0/28.0.cil
+++ b/private/compat/28.0/28.0.cil
@@ -1571,6 +1571,7 @@
     system_linker_exec
     system_seccomp_policy_file
     system_security_cacerts_file
+    tcpdump_exec
     system_zoneinfo_file
 ))
 (typeattributeset systemkeys_data_file_28_0 (systemkeys_data_file))
diff --git a/private/file_contexts b/private/file_contexts
index 9046ee1..5e74419 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -198,6 +198,7 @@
 /system/bin/sload_f2fs	--	u:object_r:e2fs_exec:s0
 /system/bin/make_f2fs	--	u:object_r:e2fs_exec:s0
 /system/bin/fsck_msdos	--	u:object_r:fsck_exec:s0
+/system/bin/tcpdump	--	u:object_r:tcpdump_exec:s0
 /system/bin/tune2fs	--	u:object_r:fsck_exec:s0
 /system/bin/toolbox	--	u:object_r:toolbox_exec:s0
 /system/bin/toybox	--	u:object_r:toolbox_exec:s0