Remove useless _C_LABEL from our assembler source.

Change-Id: I41a9181537c70ecc69ef8035132c9a83811a40d0
diff --git a/libc/arch-arm64/bionic/_setjmp.S b/libc/arch-arm64/bionic/_setjmp.S
index ea70a52..6cbf5c6 100644
--- a/libc/arch-arm64/bionic/_setjmp.S
+++ b/libc/arch-arm64/bionic/_setjmp.S
@@ -105,7 +105,7 @@
 
     /* 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)
diff --git a/libc/arch-arm64/bionic/setjmp.S b/libc/arch-arm64/bionic/setjmp.S
index b1ec0a8..2d8631b 100644
--- a/libc/arch-arm64/bionic/setjmp.S
+++ b/libc/arch-arm64/bionic/setjmp.S
@@ -45,7 +45,7 @@
     stp     x0, x30, [sp, #-16]!
 
     mov     x0, xzr
-    bl      PIC_SYM(_C_LABEL(sigblock), PLT)
+    bl      PIC_SYM(sigblock, PLT)
     mov     w1, w0
 
     ldp     x0, x30, [sp], #16
@@ -117,7 +117,7 @@
 
     /* 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)
diff --git a/libc/arch-arm64/bionic/sigsetjmp.S b/libc/arch-arm64/bionic/sigsetjmp.S
index 3afceab..cde1cbb 100644
--- a/libc/arch-arm64/bionic/sigsetjmp.S
+++ b/libc/arch-arm64/bionic/sigsetjmp.S
@@ -35,8 +35,8 @@
  */
 
 ENTRY(sigsetjmp)
-    cbz     w1, PIC_SYM(_C_LABEL(_setjmp), PLT)
-    b       PIC_SYM(_C_LABEL(setjmp), PLT)
+    cbz     w1, PIC_SYM(_setjmp, PLT)
+    b       PIC_SYM(setjmp, PLT)
 END(sigsetjmp)
 
 .L_setjmp_magic:
@@ -46,6 +46,6 @@
     ldr     w2, .L_setjmp_magic
     ldr     w3, [x0]
     cmp     w2, w3
-    b.eq    PIC_SYM(_C_LABEL(_longjmp), PLT)
-    b       PIC_SYM(_C_LABEL(longjmp), PLT)
+    b.eq    PIC_SYM(_longjmp, PLT)
+    b       PIC_SYM(longjmp, PLT)
 END(siglongjmp)