Merge of 2.063.2

[Kai Nacke]

Hi!

The DMD frontend 2.063.2 is now merged in LDC head. You may want 
to give it a try as some other improvements are already 
implemented:

- exception chaining
- extern(C++)
- support for static arrays, vector types and enums in Dwarf 
debug info
- some fixes to vector types

The code base is not yet ready for a next release as some 
important issues are not yet fixed.
The number of failing test cases on Linux/PPC64 raised from 50 to 
150 which is a clear indication that there is still a bug lurking 
in the code. On Linux/x86_64, all tests are passing.

Regards
Kai