ClangTools: Do not include our wrapped Qt headers

These are only necessary for the code model and can prevent clazy from
finding certain issues.

Fixes: QTCREATORBUG-24845
Change-Id: I04ba6703812918c39ebbde1dbac5af85fe18622d
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/clangtools/clangtoolruncontrol.cpp

@@ -121,7 +121,7 @@ AnalyzeUnit::AnalyzeUnit(const FileInfo &fileInfo,
 {
     CompilerOptionsBuilder optionsBuilder(*fileInfo.projectPart,
                                           UseSystemHeader::No,
-                                          UseTweakedHeaderPaths::Yes,
+                                          UseTweakedHeaderPaths::Tools,
                                           UseLanguageDefines::No,
                                           UseBuildSystemWarnings::No,
                                           clangVersion,

src/plugins/cpptools/compileroptionsbuilder.cpp

@@ -298,6 +298,7 @@ void CompilerOptionsBuilder::enableExceptions()
 
 void CompilerOptionsBuilder::insertWrappedQtHeaders()
 {
+    if (m_useTweakedHeaderPaths == UseTweakedHeaderPaths::Yes)
         insertWrappedHeaders(wrappedQtHeadersIncludePath());
 }
 

src/plugins/cpptools/compileroptionsbuilder.h

@@ -33,7 +33,7 @@ namespace CppTools {
 
 enum class UsePrecompiledHeaders : char { Yes, No };
 enum class UseSystemHeader : char { Yes, No };
-enum class UseTweakedHeaderPaths : char { Yes, No };
+enum class UseTweakedHeaderPaths : char { Yes, Tools, No };
 enum class UseToolchainMacros : char { Yes, No };
 enum class UseLanguageDefines : char { Yes, No };
 enum class UseBuildSystemWarnings : char { Yes, No };