Support for __restrict__ keyword

[reiver-dev]

Please add support for __restrict__ extension.

• restrict is not a valid C++ keyword, though many code-bases do #define restrict __restrict__
• ms extension __restrict is currently supported
• gcc/clang __restrict__ is not supported and thus results in type definition to be binary expression T * var instead.

[reiver-dev]

Figured out the issue has to be solved at C grammar: tree-sitter/tree-sitter-c#71

[amaanq]

It's fixed now