arc: Fix printf size_t format related warnings (again...)

The basic idea: Define size_t using the __SIZE_TYPE__ compiler-defined
type.

For detailed explanation see similar patch for the nios2 arch:
http://patchwork.ozlabs.org/patch/379938/

Signed-off-by: Vasili Galka <vvv444@gmail.com>
Cc: Alexey Brodkin <alexey.brodkin@synopsys.com>
1 file changed