apply clang-format

args.c

args.h

ivfdec.c

ivfdec.h

ivfenc.c

ivfenc.h

md5_utils.c

rate_hist.c

test/acm_random.h

test/active_map_refresh_test.cc

test/active_map_test.cc

test/aq_segment_test.cc

test/arf_freq_test.cc

test/avg_test.cc

test/boolcoder_test.cc

test/borders_test.cc

test/clear_system_state.h

test/codec_factory.h

test/convolve_test.cc

test/cpu_speed_test.cc