Adds missing license headers on some scripts and test files

autogen.sh

celt/tests/test_unit_cwrs32.c

celt/tests/test_unit_dft.c

celt/tests/test_unit_entropy.c

celt/tests/test_unit_laplace.c

celt/tests/test_unit_mathops.c

celt/tests/test_unit_mdct.c

celt/tests/test_unit_rotation.c

celt/tests/test_unit_types.c

doc/build_draft.sh

doc/build_oggdraft.sh

src/mlp_data.c

src/opus_compare.c

tests/run_vectors.sh

win32/config.h