rsnapshot: fix host path in rsnapshot.conf.default

Fix host path for commands: mount, umount:

  .../tmp/sysroots/x86_64-linux/bin/mount  -> /bin/mount
  .../tmp/sysroots/x86_64-linux/bin/umount -> /bin/umount

Signed-off-by: Wenzong Fan <wenzong.fan@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-support/rsnapshot/rsnapshot_git.bb

@@ -40,6 +40,8 @@ EXTRA_OECONF += "--without-cp \
                  --without-logger \
                  --without-rsync \
                  ac_cv_path_PERL=${bindir}/perl \
+                 ac_cv_path_MOUNT=${base_bindir}/mount \
+                 ac_cv_path_UMOUNT=${base_bindir}/umount \
                 "
 
 # Create 't/include.ac' before starting the autoreconf to fix configure