Document the --load option.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19822 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CommandGuide/llc.pod b/docs/CommandGuide/llc.pod
index 9845093..e7b42f3c 100644
--- a/docs/CommandGuide/llc.pod
+++ b/docs/CommandGuide/llc.pod
@@ -134,6 +134,12 @@
 
 =back
 
+=item B<--load>=F<dso_path>
+
+Dynamically load F<dso_path> (a path to a dynamically shared object) that
+implements an LLVM target. This will permit the target name to be used with the
+B<-march> option so that code can be generated for that target.
+
 =back
 
 =head2 Intel IA-32-specific Options