Make error messages even better!

Change-Id: I72bd1eb1d526dc59833e5bc3c636171f7f9545af
diff --git a/libc/bionic/__strrchr_chk.cpp b/libc/bionic/__strrchr_chk.cpp
index 2bdf36a..e6daf8f 100644
--- a/libc/bionic/__strrchr_chk.cpp
+++ b/libc/bionic/__strrchr_chk.cpp
@@ -37,7 +37,7 @@
 
     for (save = NULL;; ++p, s_len--) {
         if (s_len == 0)
-            __fortify_chk_fail("strrchr read overrun prevented", 0);
+            __fortify_chk_fail("strrchr prevented read past end of buffer", 0);
         if (*p == (char) ch)
             save = (char *)p;
         if (!*p)