Avoid explicit checks for windows host when working with file paths

We have fileNameCaseSensitivity and withExecutableSuffix et al.

Change-Id: I79bd2cd57e258c3f15673a661a49bab597d7afa4
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/debugger/breakhandler.cpp

@@ -181,7 +181,7 @@ QIcon BreakHandler::emptyIcon()
 
 static inline bool fileNameMatch(const QString &f1, const QString &f2)
 {
-    if (Utils::HostOsInfo::isWindowsHost())
+    if (Utils::HostOsInfo::fileNameCaseSensitivity() == Qt::CaseInsensitive)
         return f1.compare(f2, Qt::CaseInsensitive) == 0;
     return f1 == f2;
 }