Add a opt-args option that can be used to pass arguments to every opt
invocation. Fixes PR7793:

bugpoint -debug test.ll --opt-args -unroll-count=4

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110555 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CommandGuide/bugpoint.pod b/docs/CommandGuide/bugpoint.pod
index 7afeea1..1870a0d 100644
--- a/docs/CommandGuide/bugpoint.pod
+++ b/docs/CommandGuide/bugpoint.pod
@@ -67,6 +67,10 @@
 Pass all arguments specified after B<--gcc-tool-args> to the invocation of
 B<gcc>.
 
+=item B<--opt-args> I<opt args>
+
+Pass all arguments specified after B<--opt-args> to the invocation of B<opt>.
+
 =item B<--disable-{dce,simplifycfg}>
 
 Do not run the specified passes to clean up and reduce the size of the test