Remove getdents from bionic.

Bug: 11156955
Change-Id: I6c306989801be552d85fba8a50dcdc79282fb9d2
diff --git a/libc/arch-arm/syscalls/getdents.S b/libc/arch-arm/syscalls/__getdents64.S
similarity index 86%
rename from libc/arch-arm/syscalls/getdents.S
rename to libc/arch-arm/syscalls/__getdents64.S
index 8f0e81a..c3d5e5b 100644
--- a/libc/arch-arm/syscalls/getdents.S
+++ b/libc/arch-arm/syscalls/__getdents64.S
@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(getdents)
+ENTRY(__getdents64)
     mov     ip, r7
     ldr     r7, =__NR_getdents64
     swi     #0
@@ -11,4 +11,4 @@
     bxls    lr
     neg     r0, r0
     b       __set_errno
-END(getdents)
+END(__getdents64)