creator: disable debug level for the qtc.* logging categories

by default all subcategories of qtc have debugging disabled.
This allows to easily use them for verbose output and replace
per module/file debug flags.

Change-Id: I130c496a9ee83d3b3b5cbd9b4e087dc00c40b113
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>

src/app/main.cpp

@@ -36,6 +36,7 @@
 #include <extensionsystem/pluginspec.h>
 #include <qtsingleapplication.h>
 #include <utils/hostosinfo.h>
+#include <utils/logging.h>
 
 #include <QDebug>
 #include <QDir>
@@ -286,6 +287,7 @@ static inline QSettings *userSettings()
 
 int main(int argc, char **argv)
 {
+    QLoggingCategory::setFilterRules(QLatin1String("qtc.*.debug=false"));
 #ifdef Q_OS_MAC
     // increase the number of file that can be opened in Qt Creator.
     struct rlimit rl;

src/libs/utils/logging.h

@@ -43,6 +43,7 @@ class QLoggingCategory
 public:
     explicit QLoggingCategory(const char *category) : name(category) {}
     ~QLoggingCategory();
+    static void setFilterRules(const QString &) {}
 
     bool isDebugEnabled() const { return false; }
     bool isWarningEnabled() const { return true; }