[PATCH] Allow pointer decay and qual stripping for _Generic

[Aaron Ballman via cfe-commits]

The control expression for a _Generic selection expression should have
its type decayed and qualifiers stripped when determining which
selection it matches. e.g., the following should compile:

  _Generic("test", char *: 1);
  const int i = 12;
  _Generic(i, int: 1);

This patch fixes PR16340.

~Aaron
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