RFR: JDK-8242302 : Refactor jpackage native code

[Alexey Semenyuk]

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