Modify the assertion in DIBuilder.cpp to cover the DWARF 5 languages

[echristo]

Looks obvious assuming you've checked the values :)

-eric

[pcc]

Closed by commit rL207428 (authored by @pcc).

lib/IR/DIBuilder.cpp

 /// information generated during this instance of compilation.
 DICompileUnit DIBuilder::createCompileUnit(unsigned Lang, StringRef Filename,
                                            StringRef Directory,
                                            StringRef Producer, bool isOptimized,
                                            StringRef Flags, unsigned RunTimeVer,
                                            StringRef SplitName,
                                            DebugEmissionKind Kind) {
 
-  assert(((Lang <= dwarf::DW_LANG_Python && Lang >= dwarf::DW_LANG_C89) ||
+  assert(((Lang <= dwarf::DW_LANG_OCaml && Lang >= dwarf::DW_LANG_C89) ||
           (Lang <= dwarf::DW_LANG_hi_user && Lang >= dwarf::DW_LANG_lo_user)) &&
          "Invalid Language tag");
   assert(!Filename.empty() &&
          "Unable to create compile unit without filename");
   Value *TElts[] = { GetTagConstant(VMContext, DW_TAG_base_type) };
   TempEnumTypes = MDNode::getTemporary(VMContext, TElts);
 
   TempRetainTypes = MDNode::getTemporary(VMContext, TElts);