The Dependencies files were generated in $srcdir even when
--srcdir is used. It caused conflicts if multiple hosts
are doing make sharing the same $srcdir. It also violated
the rule that --srcdir would not modify the content of $srcdir
which could be on a read-only media like a CD-ROM.
Solution:
Dependencies files are generated in the "current" directory.
Platform tested:
dangermouse (linux), modi4 (IRIX64).
e29f213cf9