Fix code gen to respect declarator precedence

[inducer]

No description provided.

[wence-]

This broke loopy's code generation for its C target with const declared variables:

import numpy
import loopy
k = loopy.make_kernel("{ : }", "a[0] = b[0]",
                      [...],
                      temporary_variables={"b": loopy.TemporaryVariable("b", dtype=float, shape=(1, ),
                                                                        initializer=numpy.arange(1, dtype=float),
                                                                        read_only=True, address_space=loopy.AddressSpace.GLOBAL)},
                      target=loopy.CTarget())

print(loopy.generate_code_v2(k).device_code())
=>

static double (const b)[1] = { 0.0 };

void loopy_kernel(double *__restrict__ (a))
{
  a[0] = b[0];
}

Notice the parentheses around (const b) which is invalid.

[wence-]

I think this was actually always a bug in loopy.

[inducer]

Reverted in 2555326.

[inducer]

Revival work ongoing in #25.