[docs][Bugpoint] Fix build break.

Bugpoint.rst:124: WARNING: Mismatch: both interpreted text role prefix
and reference suffix.

llvm-svn: 372160

llvm/docs/Bugpoint.rst

@@ -121,7 +121,7 @@ non-obvious ways.  Here are some hints and tips:
   miscompilation.  Programs should be temporarily modified to disable outputs
   that are likely to vary from run to run.
 
-* In the `crash debugger`_, ``bugpoint`` does not distiguish different crashes
+* In the crash debugger, ``bugpoint`` does not distiguish different crashes
   during reduction. Thus, if new crash or miscompilation happens, ``bugpoint``
   will continue with the new crash instead. If you would like to stick to
   particular crash, you should write check scripts to validate the error