Fix build by avoiding the _C_LABEL macro.

Change-Id: Ide367c2b65071388bd95fbc81a4ed6ae94aec4e4
diff --git a/libc/arch-mips64/syscalls/fstatat64.S b/libc/arch-mips64/syscalls/fstatat64.S
index df00901..828439a 100644
--- a/libc/arch-mips64/syscalls/fstatat64.S
+++ b/libc/arch-mips64/syscalls/fstatat64.S
@@ -30,5 +30,5 @@
     .set pop
     .end fstatat64
 
-    .globl _C_LABEL(fstatat)
-    .equ _C_LABEL(fstatat), _C_LABEL(fstatat64)
+    .globl fstatat
+    .equ fstatat, fstatat64