Add TransformUtils dependency to DxilContainer for Linux builds (#5468)

The dependency is necessary because DxilContainerAssembler.cpp uses
llvm::CloneModule.

lib/DxilContainer/LLVMBuild.txt

@@ -13,4 +13,4 @@
 type = Library
 name = DxilContainer
 parent = Libraries
-required_libraries = BitReader BitWriter Core DxcSupport IPA Support DXIL
+required_libraries = BitReader BitWriter Core DxcSupport IPA Support DXIL TransformUtils