Tracking issue: Better coverage of C functions

[Erk-]

This is a tracking issue for offering better support for the Futhark C-API

Configuration

• [ ] futhark_context_config_set_debugging
• [ ] futhark_context_config_set_profiling
• [ ] futhark_context_config_set_logging
• [ ] futhark_context_config_set_tuning_param
• [ ] futhark_get_tuning_param_count
• [ ] futhark_get_tuning_param_name
• [ ] futhark_get_tuning_param_name
• [ ] futhark_get_tuning_param_class
• [ ] futhark_context_config_set_cache_file

Context

• [ ] futhark_context_pause_profiling
• [ ] futhark_context_unpause_profiling
• [ ] futhark_context_get_error
• [ ] futhark_context_set_logging_file
• [ ] futhark_context_report
• [ ] futhark_context_clear_caches

Opaque values

• [ ] futhark_store_opaque_foo
• [ ] futhark_restore_opaque_foo

GPU

• [ ] futhark_context_config_set_device

OpenCL

• [ ] futhark_context_config_set_platform
• [ ] futhark_context_config_select_device_interactively
• [ ] futhark_context_new_with_command_queue
• [ ] futhark_context_get_command_queue

Exotic

• [ ] futhark_context_config_set_default_group_size
• [ ] futhark_context_config_set_default_num_groups
• [ ] futhark_context_config_set_default_tile_size
• [ ] futhark_context_config_dump_program_to
• [ ] futhark_context_config_load_program_from

Multicore

• [ ] context_config_set_num_threads