Set DataLayout from our TargetMachine (#12335)

Otherwise LLJIT's constructor will ask the LLJITBuilder's JTMB to
create a DataLayout. As we don't propagate the JTMB (yet -- we
probably should!), this will be wrong if target features influence
the DataLayout.

This should fix #12293.

lib/Interpreter/IncrementalJIT.cpp

@@ -478,6 +478,7 @@ IncrementalJIT::IncrementalJIT(
   ErrorAsOutParameter _(&Err);
 
   LLJITBuilder Builder;
+  Builder.setDataLayout(m_TM->createDataLayout());
   Builder.setExecutorProcessControl(std::move(EPC));
 
   // Create ObjectLinkingLayer with our own MemoryManager.