add advice bullet about -check-exit-code


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11327 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CommandGuide/bugpoint.html b/docs/CommandGuide/bugpoint.html
index f19d0cd..96f7e90 100644
--- a/docs/CommandGuide/bugpoint.html
+++ b/docs/CommandGuide/bugpoint.html
@@ -152,6 +152,11 @@
     <tt>bugpoint</tt> crashes before you see its "All input ok" message,
     you might try <tt>llvm-link -v</tt> on the same set of input files. If
     that also crashes, you may be experiencing a linker bug.
+
+<li>If your program is <b>supposed</b> to crash, <tt>bugpoint</tt> will be
+    confused. One way to deal with this is to cause bugpoint to ignore the exit
+    code from your program, by giving it the <tt>-check-exit-code=false</tt>
+    option.
     
 </ol>