bring android tmp file creation from gnat-aux over
Remove use of g-trasym-bsd, affected by GPL license
Revert "Remove use of g-trasym-bsd, affected by GPL license"

This reverts commit dabb73c303fc28af142213d5044b445b30e472d2.

The traceback did not contaminate the runtime with GPL.   However, it
was missing the implementation in adaint.c!
Revert to baseline for g-trasym

The baseline for g-trasym is "unimplemented" and the
g-trasym-unimplemented version has been removed.  Adapt accordingly.
Add back missing traceback-symbol functionality