add readlink to mediacodec-x86.policy

bug: 130216896
Change-Id: Id46881507b0ccfcdf9fbea681c68b000efc113bb
diff --git a/services/mediacodec/seccomp_policy/mediacodec-x86.policy b/services/mediacodec/seccomp_policy/mediacodec-x86.policy
index 845f84b..d9c4045 100644
--- a/services/mediacodec/seccomp_policy/mediacodec-x86.policy
+++ b/services/mediacodec/seccomp_policy/mediacodec-x86.policy
@@ -45,6 +45,7 @@
 exit_group: 1
 rt_sigreturn: 1
 ugetrlimit: 1
+readlink: 1
 readlinkat: 1
 _llseek: 1
 fstatfs64: 1