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

The code failed to filter-out git-add properly on platforms were $X is
not empty (ATM there is only one such a platform).

Than it tried to create a hardlink to the file ($execdir/git-add) it just
removed (because git-add is first in the BUILT_INS), 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>
---
 Makefile |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

2008/8/28 Alex Riesen [off-list ref]:

2008/8/28 Alex Riesen [off-list ref]:

quoted

It created endless symlink loops on cygwin, but obviously nowhere else.

Sh@#! Scrap that, there is something else going on in that cygwindows thing...

Well, as usual, simple fix for trivial typo caused by existence of an
idiotic platform.