[PATCH rt-tests RFC] install: Fix failed to create symbolic link hwlatdetect file exists

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The following build error can occur if you have done a previous make install

if test -n "/usr/lib/python2.7/site-packages" ; then \
	install -D -m 755 src/hwlatdetect/hwlatdetect.py /usr/lib/python2.7/site-packages/hwlatdetect.py ; \
	ln -s /usr/lib/python2.7/site-packages/hwlatdetect.py "/usr/local/bin/hwlatdetect" ; \
fi
ln: failed to create symbolic link `/usr/local/bin/hwlatdetect': File exists
make: *** [install] Error 1

Fix the error by removing the symbolic link.

Signed-off-by: John Kacur <jkacur@xxxxxxxxxx>
---
 Makefile |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/Makefile b/Makefile
index ff697ca..31e1792 100644
--- a/Makefile
+++ b/Makefile
@@ -125,6 +125,7 @@ install: all
 	cp $(TARGETS) "$(DESTDIR)$(bindir)"
 	if test -n "$(PYLIB)" ; then \
 		install -D -m 755 src/hwlatdetect/hwlatdetect.py $(DESTDIR)$(PYLIB)/hwlatdetect.py ; \
+		rm -f "$(DESTDIR)$(bindir)/hwlatdetect" ; \
 		ln -s $(PYLIB)/hwlatdetect.py "$(DESTDIR)$(bindir)/hwlatdetect" ; \
 	fi
 	install -D -m 644 src/backfire/backfire.c "$(DESTDIR)$(srcdir)/backfire/backfire.c"
-- 
1.7.7.6

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