Ios: Move tools to <libexec>/ios, make them lowercase, fix deployment

They can't be directly in libexec path, because then they couldn't have
their own qt.conf for resolving the Cocoa platform plugin.

Change-Id: I8f3fae85c548747a7d826c078c7ac1fb0a836b43
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>

src/plugins/ios/iosconfigurations.cpp

@@ -103,14 +103,6 @@ void IosConfigurations::setConfig(const IosConfig &devConfigs)
     emit updated();
 }
 
-FileName IosConfigurations::iosToolPath() const
-{
-    FileName res = FileName::fromString(QCoreApplication::applicationDirPath()
-                                        + QLatin1String("/iosTool"));
-    return res;
-}
-
-
 bool equalKits(Kit *a, Kit *b)
 {
     return ToolChainKitInformation::toolChain(a) == ToolChainKitInformation::toolChain(b)