[Patch] C, C++, Fortran, OpenMP: Add support for device-modifiers for 'omp target device'

This patch adds device-modifiers to the device clause: #pragma omp target device ([ device-modifier :] integer-expression) where device-modifier is either 'ancestor' or 'device_num'. The 'device_num' case #pragma omp target device (device_num : integer-expression) is treated in the same

*Ping* [Patch] Fortran: Fix bind(C) character length checks

*Ping* I intent to incorporate Sandra's suggestions, except for the beginning of line spacing - that's needed to avoid exceeding the 80 character line limit. I did not include an updated patch as just pinging is easier on a mobile during vacation :-) Thanks, Tobias Loosemore, Sandra wrote: