Make error messages even better!

Change-Id: I72bd1eb1d526dc59833e5bc3c636171f7f9545af
diff --git a/libc/arch-arm/generic/bionic/memset.S b/libc/arch-arm/generic/bionic/memset.S
index 399bae9..47dcedd 100644
--- a/libc/arch-arm/generic/bionic/memset.S
+++ b/libc/arch-arm/generic/bionic/memset.S
@@ -130,4 +130,4 @@
 
         .data
 error_string:
-        .string     "memset buffer overflow"
+        .string     "memset prevented write past end of buffer"