By default, both profiles are activated. (nothig == -Pjava,natives
You can run -Pjava if you wish to build only java part (eg call from make)
-Pnatives can not be run alone.
I had left headers generation in java part for several reasons:
 - it is javac call
 - it would require duplication of maven-compile rplugin declaration
   (move of javc -h configuration)
 - once the crosscompilation is added, that would require another
   triplication f maven compiler plugin and duplication of java -h
   configuration

This is intentional separate chnage, otherwise the refactoring form previous
commit will be unreadable