generator: Quote paths passed to container image extraction commands

Some paths were being passed to container extraction commands (tar,
docker cp) without quotes.  This caused the extraction to fail if
the paths contained spaces.

Author: euanh

Sources/SwiftSDKGenerator/Generator/SwiftSDKGenerator+Unpack.swift

@@ -59,14 +59,14 @@ extension SwiftSDKGenerator {
     if hostSwiftPackagePath.string.contains("tar.gz") {
       try await Shell.run(
         #"""
-        tar -xzf \#(hostSwiftPackagePath) -C "\#(pathsConfiguration.toolchainDirPath)" -x \#(excludes.joined(separator: " ")) --strip-components=1
+        tar -xzf "\#(hostSwiftPackagePath)" -C "\#(pathsConfiguration.toolchainDirPath)" -x \#(excludes.joined(separator: " ")) --strip-components=1
         """#,
         shouldLogCommands: isVerbose
       )
     } else {
       try await Shell.run(
         #"""
-        tar -x --to-stdout -f \#(hostSwiftPackagePath) \*.pkg/Payload |
+        tar -x --to-stdout -f "\#(hostSwiftPackagePath)" \*.pkg/Payload |
         tar -C "\#(pathsConfiguration.toolchainDirPath)" -x \#(excludes.joined(separator: " ")) --include usr
         """#,
         shouldLogCommands: isVerbose

Sources/SwiftSDKGenerator/Generator/SwiftSDKGenerator.swift

@@ -118,7 +118,7 @@ public actor SwiftSDKGenerator {
       else { return }
     }
     try await Shell.run(
-      "\(Self.dockerCommand) cp \(id):\(containerPath) - | tar x -C \(localPath.removingLastComponent())",
+      #"\#(Self.dockerCommand) cp \#(id):\#(containerPath) - | tar x -C "\#(localPath.removingLastComponent())""#,
       shouldLogCommands: self.isVerbose
     )
   }