Replace BINDIR variable as well

Add bindir to the list of variables replaced at make time.

Signed-off-by: Luca Bigliardi <shammash@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

Makefile.am

@@ -355,6 +355,7 @@ $(REPLACE_VARS_SED): Makefile stamp-directories
 	{ echo 's#@PREFIX@#$(prefix)#g'; \
 	  echo 's#@SYSCONFDIR@#$(sysconfdir)#g'; \
 	  echo 's#@LOCALSTATEDIR@#$(localstatedir)#g'; \
+	  echo 's#@BINDIR@#$(bindir)#g'; \
 	  echo 's#@SBINDIR@#$(sbindir)#g'; \
 	  echo 's#@GANETI_VERSION@#$(PACKAGE_VERSION)#g'; \
 	  echo 's#@CUSTOM_XEN_KERNEL@#$(XEN_KERNEL)#g'; \