Upgrade rust/crates/num-bigint to 0.4.2

Test: make
Change-Id: I93164cb5b9bd6aa937e50073648fbf10996167c9
diff --git a/Android.bp b/Android.bp
index 6e46e32..1d29c81 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,8 +1,6 @@
 // This file is generated by cargo2android.py --config cargo2android.json.
 // Do not modify this file as changes will be overridden on upgrade.
 
-
-
 package {
     default_applicable_licenses: ["external_rust_crates_num-bigint_license"],
 }
@@ -57,6 +55,8 @@
     name: "libnum_bigint",
     host_supported: true,
     crate_name: "num_bigint",
+    cargo_env_compat: true,
+    cargo_pkg_version: "0.4.2",
     srcs: [
         "src/lib.rs",
         ":copy_num-bigint_build_out",
@@ -83,6 +83,8 @@
         "src/lib.rs",
         ":copy_num-bigint_build_out",
     ],
+    cargo_env_compat: true,
+    cargo_pkg_version: "0.4.2",
     test_suites: ["general-tests"],
     auto_gen_config: true,
     edition: "2018",
@@ -116,6 +118,8 @@
 rust_defaults {
     name: "num-bigint_test_defaults_num_bigint",
     crate_name: "num_bigint",
+    cargo_env_compat: true,
+    cargo_pkg_version: "0.4.2",
     test_suites: ["general-tests"],
     auto_gen_config: true,
     edition: "2018",