Turn the error message about package mismatch into a warning. This is
really harmless at the moment (only fatal with DLLs), but really gets
in the way when you want to build a package and also use it directly
with the appropriate -i/-l flags.
(hiModuleNameMismatchWarn wanted_mod read_mod)
`thenRn_`
-- check that the package names agree
- checkRn
+ warnCheckRn
(modulePackage wanted_mod == modulePackage read_mod)
(packageNameMismatchWarn wanted_mod read_mod)
`thenRn_`