Fix System.Memory.Reallocate because HeapReAlloc (NULL, ...) fails in Windows
Implement units in tasking directory for Windows
Insert a test of indexed entries into examples/tasking6.adb
Improve Ada.Text_IO.Col, Line, Line_Length and Page_Length writing the escape-sequence(s) directly
Retry ACATS
Merge commit 'b76e44e' into gcc-4.7

I did NOT try ACATS with gcc-4.7 on this merge!

Reversions:
	examples/acats/drake-expected.txt
	examples/acats/gnat-expected.txt