build phobos as .so
Fixes Issue 7666 - Implement function to reverse fields of a tuple.
Merge pull request #1244 from AndrejMitrovic/Fix7666

Issue 7666 - Implement function to reverse fields of a tuple.
Revert Fix for 7666.
Merge pull request #1246 from AndrejMitrovic/Revert7666

Revert Fix for 7666.
Merge pull request #1240 from WalterBright/build-so-obj

build phobos as .so