[clang] [Clang] add additional tests for -Wshift-bool (PR #130339)

[Aaron Ballman via cfe-commits]

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@@ -22,4 +23,6 @@ void t() {
 
   if ((y << 1) != 0) { }
   if ((y >> 1) != 0) { } // expected-warning {{right shifting a 'bool' implicitly converts it to 'int'}}
+
+  bool k = (x < z) >> 1; // expected-warning {{right shifting a 'bool' implicitly converts it to 'int'}}
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AaronBallman wrote:

It would be good to have this as a test in C as well; it should not diagnose there because `x < z` results in an `int`, not a `bool`.

https://github.com/llvm/llvm-project/pull/130339