Remove getdents from bionic.

Bug: 11156955
Change-Id: I6c306989801be552d85fba8a50dcdc79282fb9d2
diff --git a/libc/arch-arm64/syscalls/getdents.S b/libc/arch-arm64/syscalls/__getdents64.S
similarity index 88%
rename from libc/arch-arm64/syscalls/getdents.S
rename to libc/arch-arm64/syscalls/__getdents64.S
index 8cd3ca7..9c65918 100644
--- a/libc/arch-arm64/syscalls/getdents.S
+++ b/libc/arch-arm64/syscalls/__getdents64.S
@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(getdents)
+ENTRY(__getdents64)
     stp     x29, x30, [sp, #-16]!
     .cfi_def_cfa_offset 16
     .cfi_rel_offset x29, 0
@@ -22,4 +22,5 @@
     b.hi    __set_errno
 
     ret
-END(getdents)
+END(__getdents64)
+.hidden __getdents64