Hi,

this fixes a -Wshadow=local warning when using AUTO_DUMP_SCOPE in
nested blocks.  Since NAME i a string I cannot use it to create
a unique name for the auto_dump_scope object.

So I used XCONCAT2 from good old symcat.h, to mangle the __LINE__
macro into the scope object name.


Bootstrapped and reg-tested on x86_64-pc-linux-gnu.
Is it OK for trunk?


Thanks
Bernd.