Add fedora to Platform.LinuxFlavor

Author: drexin

Sources/TSCUtility/Platform.swift

@@ -20,6 +20,7 @@ public enum Platform {
     /// Recognized flavors of linux.
     public enum LinuxFlavor {
         case debian
+        case fedora
     }
 
     /// Lazily checked current platform.
@@ -38,6 +39,11 @@ public enum Platform {
                localFileSystem.isFile(AbsolutePath("/system/bin/toybox")) {
                 return .android
             }
+            if localFileSystem.isFile(AbsolutePath("/etc/redhat-release")) ||
+               localFileSystem.isFile(AbsolutePath("/etc/centos-release")) ||
+               localFileSystem.isFile(AbsolutePath("/etc/fedora-release")) {
+                return .linux(.fedora)
+            }
         default:
             return nil
         }