[DWARFv5] Emit .debug_line_str (in a non-DWO file).

This should enable the linker to do string-pooling of path names.

Differential Revision: https://reviews.llvm.org/D42707

llvm-svn: 324393
diff --git a/llvm/lib/MC/StringTableBuilder.cpp b/llvm/lib/MC/StringTableBuilder.cpp
index 531bc93..de40a77 100644
--- a/llvm/lib/MC/StringTableBuilder.cpp
+++ b/llvm/lib/MC/StringTableBuilder.cpp
@@ -31,6 +31,7 @@
   // correct.
   switch (K) {
   case RAW:
+  case DWARF:
     Size = 0;
     break;
   case MachO:
@@ -116,6 +117,7 @@
 }
 
 void StringTableBuilder::finalize() {
+  assert(K != DWARF);
   finalizeStringTable(/*Optimize=*/true);
 }