This fixes several of these:
```
[3524/7446] Building CXX object projects\compiler-rt\lib\orc\CMakeFiles\RTOrc.x86_64.dir\dlfcn_wrapper.cpp.obj
In file included from C:\git\llvm-project\compiler-rt\lib\orc\dlfcn_wrapper.cpp:15:
C:\git\llvm-project\compiler-rt\lib\orc\wrapper_function_utils.h(299,27): warning: address of '__orc_rt_jit_dispatch_ctx' will always evaluate to 'true' [-Wpointer-bool-conversion]
299 | if (ORC_RT_UNLIKELY(!&__orc_rt_jit_dispatch_ctx))
| ~ ^~~~~~~~~~~~~~~~~~~~~~~~~
C:\git\llvm-project\compiler-rt\lib\orc\compiler.h(60,55): note: expanded from macro 'ORC_RT_UNLIKELY'
60 | #define ORC_RT_UNLIKELY(EXPR) __builtin_expect((bool)(EXPR), false)
| ^~~~
1 warning generated.
```
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