Make error messages even better!

Change-Id: I72bd1eb1d526dc59833e5bc3c636171f7f9545af
diff --git a/libc/arch-arm/krait/bionic/memset.S b/libc/arch-arm/krait/bionic/memset.S
index 005dfd8..6595e1f 100644
--- a/libc/arch-arm/krait/bionic/memset.S
+++ b/libc/arch-arm/krait/bionic/memset.S
@@ -116,4 +116,4 @@
 
         .data
 error_string:
-        .string     "memset buffer overflow"
+        .string     "memset prevented write past end of buffer"