Improve diagnostics from the assembler __strcat_chk routines.

Change-Id: I44cbe5389c66de6618e581a6e302eea22c39d6fb
diff --git a/libc/arch-arm/krait/bionic/__strcat_chk.S b/libc/arch-arm/krait/bionic/__strcat_chk.S
index fabca24..a46ff98 100644
--- a/libc/arch-arm/krait/bionic/__strcat_chk.S
+++ b/libc/arch-arm/krait/bionic/__strcat_chk.S
@@ -176,7 +176,9 @@
 .L_strlen_done:
     add     r2, r3, r4
     cmp     r2, lr
-    bhi     .L_strcat_chk_failed
+    itt     hi
+    movhi   r0, lr
+    bhi     __strcat_chk_fail
 
     // Set up the registers for the memcpy code.
     mov     r1, r5
@@ -194,15 +196,4 @@
     .cfi_adjust_cfa_offset 8
     .cfi_rel_offset r4, 0
     .cfi_rel_offset r5, 4
-.L_strcat_chk_failed:
-    ldr     r0, error_message
-1:
-    add     r0, pc
-    bl      __fortify_fatal
-error_message:
-    .word   error_string-(1b+4)
 END(__strcat_chk)
-
-    .data
-error_string:
-    .string "strcat: prevented write past end of buffer"