* use xcode-select to find correct paths for iOS build

* add iOS definitions for CMake
* ServerApplication on Android must use events instead of signals to wait for server termination.

Util/include/Poco/Util/ServerApplication.h

@@ -196,6 +196,9 @@ private:
 	void handlePidFile(const std::string& name, const std::string& value);
 	bool isDaemon(int argc, char** argv);
 	void beDaemon();
+#if defined(POCO_ANDROID)
+	static Poco::Event _terminate;
+#endif
 #elif defined(POCO_OS_FAMILY_WINDOWS)
 #if !defined(_WIN32_WCE)
 	enum Action