Qt Creator CMake port

Based on Tobias Hunger's work from a few months ago.

The CMake configuration needs libclang and Qt paths specified as
CMAKE_PREFIX_PATH.

Auto tests are run with "ctest". At the moment the pass rate is 87%.

Change-Id: Iba98e39bf22077d52706dce6c85986be67a6eab0
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/3rdparty/cplusplus/CMakeLists.txt

@@ -0,0 +1,45 @@
+add_qtc_library(3rd_cplusplus OBJECT
+  PUBLIC_DEPENDS Qt5::Core Utils
+  DEFINES CPLUSPLUS_BUILD_LIB
+  INCLUDES "${CMAKE_SOURCE_DIR}/src/libs"
+  SOURCES
+    AST.cpp AST.h
+    ASTClone.cpp
+    ASTMatch0.cpp
+    ASTMatcher.cpp ASTMatcher.h
+    ASTPatternBuilder.h
+    ASTVisit.cpp
+    ASTVisitor.cpp ASTVisitor.h
+    ASTfwd.h
+    Bind.cpp Bind.h
+    CPlusPlus.h
+    CPlusPlusForwardDeclarations.h
+    Control.cpp Control.h
+    CoreTypes.cpp CoreTypes.h
+    DiagnosticClient.cpp DiagnosticClient.h
+    FullySpecifiedType.cpp FullySpecifiedType.h
+    Keywords.cpp
+    Lexer.cpp Lexer.h
+    LiteralTable.h
+    Literals.cpp Literals.h
+    Matcher.cpp Matcher.h
+    MemoryPool.cpp MemoryPool.h
+    Name.cpp Name.h
+    NameVisitor.cpp NameVisitor.h
+    Names.cpp Names.h
+    ObjectiveCAtKeywords.cpp
+    ObjectiveCTypeQualifiers.cpp ObjectiveCTypeQualifiers.h
+    Parser.cpp Parser.h
+    QtContextKeywords.cpp QtContextKeywords.h
+    SafeMatcher.cpp SafeMatcher.h
+    Scope.cpp Scope.h
+    Symbol.cpp Symbol.h
+    SymbolVisitor.h
+    Symbols.cpp Symbols.h
+    Templates.cpp Templates.h
+    Token.cpp Token.h
+    TranslationUnit.cpp TranslationUnit.h
+    Type.cpp Type.h
+    TypeVisitor.cpp TypeVisitor.h
+    cppassert.h
+)