[orc-rt] Add inline specifier to orc_rt::make_error. (#154922)

Prevents linker errors for duplicate definitions when make_error is used
from more than one file.

orc-rt/include/orc-rt/Error.h

@@ -126,7 +126,7 @@ private:
 };
 
 /// Create an Error from an ErrorInfoBase.
-Error make_error(std::unique_ptr<ErrorInfoBase> Payload) {
+inline Error make_error(std::unique_ptr<ErrorInfoBase> Payload) {
   return Error(std::move(Payload));
 }