Add Rust 1.45.2 Gnu x64 (#3167)

manifests/Rustlang/rust-gnu/1.45.2.yaml

@@ -0,0 +1,18 @@
+Id: Rustlang.rust-gnu
+Version: 1.45.2
+Name: rust-gnu
+Publisher: Rustlang
+License: Apache 2.0 and MIT
+LicenseUrl: https://raw.githubusercontent.com/rust-lang/rust/master/COPYRIGHT
+AppMoniker: rust-gnu
+Tags: rust, windows, gnu
+Description: this is the rust-lang built with gnu toolchain
+Homepage: https://www.rust-lang.org/
+Installers:
+  - Arch: x64
+    Url: https://static.rust-lang.org/dist/rust-1.45.2-x86_64-pc-windows-gnu.msi
+    Sha256: 9866B117FF185E8CA68F4B05CC809E226065BDE74E2C211119618583B5284A8B
+    InstallerType: msi
+    Switches:
+      Silent: "/quiet"
+      SilentWithProgress: "/quiet /passive"