[PATCH] Fix use of hardlinks in "make install"

The code tried to create a hardlink to the file ($execdir/git-add) it just
removed, so ln failed (but because stderr was redirected into /dev/null the
error was never seen), and the whole install ended up using "ln -s" instead.

Signed-off-by: Alex Riesen <redacted>
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It created endless symlink loops on cygwin, but obviously nowhere else.

 Makefile |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)