Merge "Increase static linkage, remove unused functions"

vp8/common/alloccommon.c

vp8/common/filter.c

vp8/common/findnearmv.c

vp8/common/findnearmv.h

vp8/common/mbpitch.c

vp8/common/postproc.c

vp8/common/reconinter.c

vp8/common/x86/subpixel_mmx.asm

vp8/decoder/decodemv.c

vp8/decoder/decodframe.c

vp8/decoder/detokenize.c

vp8/decoder/onyxd_if.c

vp8/decoder/threading.c

vp8/decoder/x86/x86_dsystemdependent.c

vp8/encoder/encodeintra.c

vp8/encoder/encodeintra.h

vp8/encoder/encodemb.c

vp8/encoder/encodemb.h

vp8/encoder/firstpass.c

vp8/encoder/generic/csystemdependent.c