Fix build by avoiding the _C_LABEL macro.

Change-Id: Ide367c2b65071388bd95fbc81a4ed6ae94aec4e4
diff --git a/libc/arch-mips64/syscalls/truncate.S b/libc/arch-mips64/syscalls/truncate.S
index b68f35c..a79cdcd 100644
--- a/libc/arch-mips64/syscalls/truncate.S
+++ b/libc/arch-mips64/syscalls/truncate.S
@@ -30,5 +30,5 @@
     .set pop
     .end truncate
 
-    .globl _C_LABEL(truncate64)
-    .equ _C_LABEL(truncate64), _C_LABEL(truncate)
+    .globl truncate64
+    .equ truncate64, truncate