adding GPL preamble to all files in openair1/PHY/CODING

openair1/PHY/CODING/3gpplte.c

openair1/PHY/CODING/3gpplte_sse.c

openair1/PHY/CODING/3gpplte_turbo_decoder.c

openair1/PHY/CODING/3gpplte_turbo_decoder_sse.c

openair1/PHY/CODING/3gpplte_turbo_decoder_sse_16bit.c

openair1/PHY/CODING/3gpplte_turbo_decoder_sse_8bit.c

openair1/PHY/CODING/ccoding_byte.c

openair1/PHY/CODING/ccoding_byte_lte.c

openair1/PHY/CODING/crc_byte.c

openair1/PHY/CODING/defs.h

openair1/PHY/CODING/extern.h

openair1/PHY/CODING/extern_3GPPinterleaver.h

openair1/PHY/CODING/lte_interleaver.h

openair1/PHY/CODING/lte_interleaver2.h

openair1/PHY/CODING/lte_interleaver_inline.h

openair1/PHY/CODING/lte_rate_matching.c

openair1/PHY/CODING/lte_segmentation.c

openair1/PHY/CODING/rate_matching.c

openair1/PHY/CODING/scrambler.h

openair1/PHY/CODING/vars.h