[llvm] [orc-rt] Ensure EH/RTTI=On overrides LLVM opts, applies to unit tests. (PR #172155)

[Jared Wyles via llvm-commits]

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@@ -39,4 +39,5 @@ add_orc_rt_unittest(CoreTests
   span-test.cpp
   DISABLE_LLVM_LINK_LLVM_DYLIB
   )
+target_compile_options(CoreTests PRIVATE ${ORC_RT_COMPILE_FLAGS})
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jaredwy wrote:

It look like these are unique to a previous project. 

Feel free to merge and ill introduce these later when I add windows support. 

https://github.com/llvm/llvm-project/pull/172155