'Avoid confusing "read prevented write" log messages' 2.

This time it's assembler.

Change-Id: Iae6369833b8046b8eda70238bb4ed0cae64269ea
diff --git a/libc/arch-arm/cortex-a9/bionic/memcpy.S b/libc/arch-arm/cortex-a9/bionic/memcpy.S
index 8904534..6e0712f 100644
--- a/libc/arch-arm/cortex-a9/bionic/memcpy.S
+++ b/libc/arch-arm/cortex-a9/bionic/memcpy.S
@@ -89,4 +89,4 @@
 
         .data
 error_string:
-        .string     "memcpy prevented write past end of buffer"
+        .string     "memcpy: prevented write past end of buffer"