Implement ftell

[Patryk Kubiak]

The function ftell needs to be implemented according to the POSIX standard: http://www.cplusplus.com/reference/cstdio/ftell/

Please use functions:

oC_ErrorCode_t       oC_VirtualFileSystem_lseek         ( oC_File_t File , uint32_t Offset );

[Patryk Kubiak]

Removing component: stdio (automated comment)