Update itertools to 0.10.3

Test: cd external/rust/crates && atest --host -c
Change-Id: Ic4635782fb45eaa4b94696aa8a7b3c5dc1910fc3
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
index d7f6b23..22a08a8 100644
--- a/Cargo.toml.orig
+++ b/Cargo.toml.orig
@@ -1,11 +1,12 @@
 [package]
 name = "itertools"
-version = "0.10.1"
+version = "0.10.3"
 
 license = "MIT/Apache-2.0"
 repository = "https://github.com/rust-itertools/itertools"
 documentation = "https://docs.rs/itertools/"
 authors = ["bluss"]
+readme = "README.md"
 
 description = "Extra iterator adaptors, iterator methods, free functions, and macros."