[DebugInfo][DWARF] Use PRIx64 explicitly in output.

llvm-svn: 310253
diff --git a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
index e840944..bb392d8 100644
--- a/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
+++ b/llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
@@ -136,13 +136,13 @@
       uint64_t StringOffset =
           StrOffsetExt.getRelocatedValue(EntrySize, &Offset);
       if (Format == DWARF32) {
-        OS << format("%8.8x ", StringOffset);
+        OS << format("%8.8" PRIx64 " ", StringOffset);
         uint32_t StringOffset32 = (uint32_t)StringOffset;
         const char *S = StrData.getCStr(&StringOffset32);
         if (S)
           OS << format("\"%s\"", S);
       } else
-        OS << format("%16.16x ", StringOffset);
+        OS << format("%16.16" PRIx64 " ", StringOffset);
       OS << "\n";
     }
   }