Added rust-gnu version 1.50.0. (#8638)

manifests/Rustlang/rust-gnu/1.50.0.yaml

@@ -0,0 +1,20 @@
+Id: Rustlang.rust-gnu
+Version: 1.50.0
+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-1.50.0-x86_64-pc-windows-gnu.msi
+  Sha256: F386733A31CF36CDD06613BC6D0607A410627C854736288301302C7170E8705A
+  InstallerType: msi
+  Switches:
+    Silent: /quiet
+    SilentWithProgress: /quiet /passive
+  ProductCode: "{D793AFC5-0AC2-41E8-AAD4-9445E90B1213}"
+