seccomp: Allow readlink(2) in x86_64 for UBSan's sake

This change allows the use of readlink(2) so that UBSan can work
correctly on x86_64.

Bug: 111999822
Test: CtsWrapWrapDebugTestCases
Change-Id: I7f3013c712e3e41567a0d8e1bbb9d378c04b4433
diff --git a/libc/SECCOMP_WHITELIST_COMMON.TXT b/libc/SECCOMP_WHITELIST_COMMON.TXT
index 08a2c2b..60568e6 100644
--- a/libc/SECCOMP_WHITELIST_COMMON.TXT
+++ b/libc/SECCOMP_WHITELIST_COMMON.TXT
@@ -57,7 +57,7 @@
 # Needed by sanitizers (b/34606909)
 # 5 (__NR_open) and 195 (__NR_stat64) are also required, but they are
 # already allowed.
-ssize_t	readlink:readlink(const char *path, char *buf, size_t bufsiz)	arm,x86,mips
+ssize_t	readlink:readlink(const char *path, char *buf, size_t bufsiz)	arm,x86,x86_64,mips
 
 # Useful new syscalls which we don't yet use in bionic.
 int sched_getattr(pid_t pid, struct sched_attr* attr, unsigned int flags) all