Remove useless _C_LABEL from our assembler source.

Change-Id: I41a9181537c70ecc69ef8035132c9a83811a40d0
diff --git a/libc/arch-arm/bionic/setjmp.S b/libc/arch-arm/bionic/setjmp.S
index 65b93fd..8927086 100644
--- a/libc/arch-arm/bionic/setjmp.S
+++ b/libc/arch-arm/bionic/setjmp.S
@@ -56,7 +56,7 @@
 	.cfi_rel_offset r14, 4
 	mov	r0, #0x00000000
 
-	bl	PIC_SYM(_C_LABEL(sigblock), PLT)
+	bl	PIC_SYM(sigblock, PLT)
 	mov	r1, r0
 
 	ldmfd	sp!, {r0, r14}
@@ -108,7 +108,7 @@
 	.cfi_adjust_cfa_offset 4
 
 	mov	r0, r2
-	bl	PIC_SYM(_C_LABEL(sigsetmask), PLT)
+	bl	PIC_SYM(sigsetmask, PLT)
 
 	add	sp, sp, #4	/* unalign the stack */
 	.cfi_adjust_cfa_offset -4
@@ -147,7 +147,7 @@
 
 	/* validation failed, die die die. */
 botch:
-	bl	PIC_SYM(_C_LABEL(longjmperror), PLT)
-	bl	PIC_SYM(_C_LABEL(abort), PLT)
+	bl	PIC_SYM(longjmperror, PLT)
+	bl	PIC_SYM(abort, PLT)
 	b	. - 8		/* Cannot get here */
 END(longjmp)