Fixes Issue 9475 - Preserve code layout in unittest body when emitting ddoc.
CTFE: Move framepointers into CtfeStack from Interstate
CTFE: Move 'localthis' into CtfeStack

We also don't create a new frame until all arguments are evaluated.
This removes a complicated hack in ThisExp, which was no longer
necessary.
Add test case for 'this' used in parameter

Fixes a gap in the test suite.
Add new Target hook to retrieve align sizes of basic types.
need to load GOT into EBX before calling PLT function

- also save/restore old EBX value
fix deactivated non-weak linkage code

- method Obj::external(const char*) was renamed to external_def
- I32 stores relocation offset in target address
Merge pull request #1745 from dawgfoto/useEBX

fix _d_dso_registry calling sequence
Merge pull request #1743 from ibuclaw/target2

Add new Target hook to retrieve align sizes of basic types.
Merge pull request #1736 from donc/ctfeStackFrames

Refactor CTFE stack frames
Merge pull request #1641 from AndrejMitrovic/Fix9475

Issue 9475 - Preserve code layout in unittest body when emitting ddoc.
Remove GCC decl/type attributes from frontend.
Merge pull request #1747 from ibuclaw/gcc_attributes

Remove GCC decl/type attributes from frontend.