1 manifest only (#2116)

manifests/Rustlang/rust-gnu-x64/1.44.1.yaml

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+Id: Rustlang.rust-gnu-x64
+Version: 1.44.1
+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-1.44.1-x86_64-pc-windows-gnu.msi
+    Sha256: E28B401C9523757AEFE677E6F6527A86B1DFD19156476F8724FA8F654436CEF4
+    InstallerType: msi
+    Switches:
+      Silent: "/quiet"
+      SilentWithProgress: "/quiet /passive"