RFR: JDK-8242302 : Refactor jpackage native code

Please review fix [2] for jpackage bug [1]. Refactor jpackage native code. - Improve code reuse between different platforms. - Replace custom string classes with the standard std::basic_string. - Merge functionality of libapplauncher.dll(.so) library with jpackageapplauncher(.exe) binary. There is no point to keep two different executables. - Link jpackageapplauncher.exe with MSVC Run-Time library statically to avoid copying of MSVC Run-Time dlls to app's bin folder. - Remove unused code. - Alexey [1] https://bugs.openjdk.java.net/browse/JDK-8242302 [2] http://cr.openjdk.java.net/~asemenyuk/8242302/webrev.00