Jobs: permit bitcode items when building with LTO

When building an archive, permit the LLVM bitcode content into the
archive as the LTO path will add those.  This should ensure that we can
continue to experiment with the LTO optimizations.

Author: compnerd

Sources/SwiftDriver/Jobs/GenericUnixToolchain+LinkerSupport.swift

@@ -297,8 +297,10 @@ extension GenericUnixToolchain {
       commandLine.appendFlag("crs")
       commandLine.appendPath(outputFile)
 
-      commandLine.append(contentsOf: inputs.filter { $0.type == .object }
-                                           .map { .path($0.file) })
+      commandLine.append(contentsOf: inputs.lazy.filter {
+                            lto == nil ? $0.type == .object
+                                       : $0.type == .object || $0.type == .llvmBitcode
+                         }.map { .path($0.file) })
       return try getToolPath(.staticLinker(lto))
     }