Add .cfi_startproc/.cfi_endproc to ENTRY/END.

Bug: 10414953
Change-Id: I711718098b9f3cc0ba8277778df64557e9c7b2a0
diff --git a/libc/arch-x86_64/bionic/__bionic_clone.S b/libc/arch-x86_64/bionic/__bionic_clone.S
index 309c365..7692013 100644
--- a/libc/arch-x86_64/bionic/__bionic_clone.S
+++ b/libc/arch-x86_64/bionic/__bionic_clone.S
@@ -70,3 +70,4 @@
         hlt
 2:
         ret
+END(__bionic_clone)