Windows Fixes for Flutter Tools (#7678)

diff --git a/packages/flutter_tools/lib/src/build_info.dart b/packages/flutter_tools/lib/src/build_info.dart
index 07b979d..76af121 100644
--- a/packages/flutter_tools/lib/src/build_info.dart
+++ b/packages/flutter_tools/lib/src/build_info.dart
@@ -45,6 +45,7 @@
 enum HostPlatform {
   darwin_x64,
   linux_x64,
+  windows_x64,
 }
 
 String getNameForHostPlatform(HostPlatform platform) {
@@ -53,6 +54,8 @@
       return 'darwin-x64';
     case HostPlatform.linux_x64:
       return 'linux-x64';
+    case HostPlatform.windows_x64:
+      return 'windows-x64';
   }
   assert(false);
   return null;
@@ -110,6 +113,8 @@
     return HostPlatform.darwin_x64;
   if (platform.isLinux)
     return HostPlatform.linux_x64;
+  if (platform.isWindows)
+    return HostPlatform.windows_x64;
 
   printError('Unsupported host platform, defaulting to Linux');