binman: Move to three-digit test-file numbers

We now have 99 tests. Before adding any more, rename everything to three
digits. This helps to preserve the ordering of tests and makes it easier
to find things.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/entry_test.py b/tools/binman/entry_test.py
index 17ab229..1f7ff5b 100644
--- a/tools/binman/entry_test.py
+++ b/tools/binman/entry_test.py
@@ -25,7 +25,7 @@
     def GetNode(self):
         binman_dir = os.path.dirname(os.path.realpath(sys.argv[0]))
         fname = fdt_util.EnsureCompiled(
-            os.path.join(binman_dir,('test/05_simple.dts')))
+            os.path.join(binman_dir,('test/005_simple.dts')))
         dtb = fdt.FdtScan(fname)
         return dtb.GetNode('/binman/u-boot')