Update clang to match llvm r250901. OptTable constructor now takes an ArrayRef. NFC

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@250903 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Driver/DriverOptions.cpp

@@ -34,7 +34,7 @@ namespace {
 class DriverOptTable : public OptTable {
 public:
   DriverOptTable()
-    : OptTable(InfoTable, llvm::array_lengthof(InfoTable)) {}
+    : OptTable(InfoTable) {}
 };
 
 }