Fix afind command

afind "*.foo" didn't work because "*.foo" got expanded inside afind

Change-Id: Ia479ed6e50e64fe2ffdf1983050a6da91d6a06f0
diff --git a/bin/afind b/bin/afind
index 080f06a..f5b8319 100755
--- a/bin/afind
+++ b/bin/afind
@@ -14,6 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# prevent glob expansion in this script
+set -f
+
 dir=${1:-.}
 
 shift