file origins
------------
- bits/gstdint.h: manually created
- bits/c++config.h:
- apply https://github.com/cproc/genode_stuff/blob/stdcxx/stdcxx_update_genode.patch
(update the gcc port hash if it conflicts)
- prepare the modified gcc port
- run 'make noux-pkg/gcc_x86' for the 'x86_32' platform
- find 'build/x86_32/noux-pkg/gcc_x86/x86_64-pc-elf/32/libstdc++-v3/include/x86_64-pc-elf/bits/c++config.h'
- run 'make noux-pkg/gcc_x86' for the 'x86_64' platform
- find 'build/x86_64/noux-pkg/gcc_x86/x86_64-pc-elf/64/libstdc++-v3/include/x86_64-pc-elf/bits/c++config.h'
- run 'make noux-pkg/gcc_arm' for the 'pbxa9' platform
- find 'build/pbxa9/noux-pkg/gcc_arm/arm-none-eabi/libstdc++-v3/include/arm-none-eabi/bits/c++config.h'
- create a combined 'c++config.h' file by making the differing macros of the three generated files
depend on the '__x86_64__' and '__ARM_EABI__' macros
