Standardizing lli's extra module command line option

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193544 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp
index 7117707..6425142 100644
--- a/tools/lli/lli.cpp
+++ b/tools/lli/lli.cpp
@@ -132,8 +132,7 @@
             cl::init("main"));
 
   cl::list<std::string>
-  ExtraModules("extra-modules",
-         cl::CommaSeparated,
+  ExtraModules("extra-module",
          cl::desc("Extra modules to be loaded"),
          cl::value_desc("<input bitcode 2>,<input bitcode 3>,..."));