Upgrade rust/crates/itoa to 0.4.7

Test: make
Change-Id: Ib3013150034cd7ce81438adff0aa9a5f738ae041
diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
index 9f048f0..14919dc 100644
--- a/.cargo_vcs_info.json
+++ b/.cargo_vcs_info.json
@@ -1,5 +1,5 @@
 {
   "git": {
-    "sha1": "4911818fcf5105eb3d3b99b8e583271ef668146c"
+    "sha1": "08c79b5e2348a4b44cac8860612c9ee1f5518544"
   }
 }