Make DataLayout a plain object, not a pass.

Instead, have a DataLayoutPass that holds one. This will allow parts of LLVM
don't don't handle passes to also use DataLayout.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202168 91177308-0d34-0410-b5e6-96231b3b80d8

examples/ExceptionDemo/ExceptionDemo.cpp

@@ -1976,7 +1976,7 @@ int main(int argc, char *argv[]) {
     // Set up the optimizer pipeline.
     // Start with registering info about how the
     // target lays out data structures.
-    fpm.add(new llvm::DataLayout(*executionEngine->getDataLayout()));
+    fpm.add(new llvm::DataLayoutPass(*executionEngine->getDataLayout()));
 
     // Optimizations turned on
 #ifdef ADD_OPT_PASSES