Add clang-query check for hasUnderlyingType() narrowing matcher

[LegalizeAdulthood]

Summary

Gives an example of how to use hasUnderlyingType() in clang-query and also serves as an integration test for that narrowing matcher

[LegalizeAdulthood]

See http://reviews.llvm.org/D8149 for the matcher

[LegalizeAdulthood]

Abandoned in favor of unit tests in the matcher library.

test/clang-query/has-underlying-type.cpp

+// RUN: clang-query -c "match typedefDecl(hasUnderlyingType(asString(\"int\")))" %s -- -std=c++11 | FileCheck %s
+
+typedef char Character;
+typedef const char ConstCharacter;
+typedef volatile char VolatileCharacter;
+typedef short Short;
+typedef const short ConstShort;
+typedef volatile short VolatileShort;
+typedef int Integer;
+// CHECK: has-underlying-type.cpp:[[@LINE-1]]:1: note: "root" binds here
+typedef const int ConstInteger;
+typedef volatile int VolatileInteger;
+typedef long Long;
+typedef const long ConstLong;
+typedef volatile long VolatileLong;
+
+typedef float Float;
+typedef const float ConstFloat;
+typedef volatile float VolatileFloat;
+typedef double Double;
+typedef const double ConstDouble;
+typedef volatile double VolatileDouble;
+
+typedef void NullaryFunctionReturningVoid();
+typedef int NullaryFunctionReturningInt();