C++: Use soft asserts instead of assert()

Some qmake versions ignore "DEFINES += NDEBUG" on Windows.

Change-Id: Ibdf3b1036c2331dcef61dcd278463c02754044d2
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

src/libs/3rdparty/cplusplus/Names.cpp

@@ -21,9 +21,8 @@
 #include "Names.h"
 #include "NameVisitor.h"
 #include "Literals.h"
-#include <cstring>
-#include <cassert>
 #include <algorithm>
+#include <cstring>
 
 using namespace CPlusPlus;