kernel32/tests: Add tests to verify USERPROFILE and environment variables from registry are present and correct.

loader: Define asm functions instead of inlines for x86-64 syscalls to avoid trouble with register constraints.

The supported Solaris version 9 and 10 do not have audioio anymore. They
are using the ESD sound driver instead.

It's still possible to run tests with this patch, but results won't be 
submitted.