Fix build by avoiding the _C_LABEL macro.

Change-Id: Ide367c2b65071388bd95fbc81a4ed6ae94aec4e4
diff --git a/libc/arch-arm64/syscalls/fstatfs64.S b/libc/arch-arm64/syscalls/fstatfs64.S
index 2c0506d..6318d56 100644
--- a/libc/arch-arm64/syscalls/fstatfs64.S
+++ b/libc/arch-arm64/syscalls/fstatfs64.S
@@ -20,5 +20,5 @@
     ret
 END(fstatfs64)
 
-    .globl _C_LABEL(fstatfs)
-    .equ _C_LABEL(fstatfs), _C_LABEL(fstatfs64)
+    .globl fstatfs
+    .equ fstatfs, fstatfs64