MachO: Improve backend diagnostic for overalignment.

Give the symbol's name and disengage the enchanced crash reporting.

llvm-svn: 191344

llvm/lib/MC/MachObjectWriter.cpp

@@ -342,7 +342,8 @@ void MachObjectWriter::WriteNlist(MachSymbolData &MSD,
       assert((1U << Log2Size) == Align && "Invalid 'common' alignment!");
       if (Log2Size > 15)
         report_fatal_error("invalid 'common' alignment '" +
-                           Twine(Align) + "'");
+                           Twine(Align) + "' for '" + Symbol.getName() + "'",
+                           false);
       // FIXME: Keep this mask with the SymbolFlags enumeration.
       Flags = (Flags & 0xF0FF) | (Log2Size << 8);
     }