x86: dsputil: Coalesce all init files

This makes the init files match the structure of the dsputil split.
configure: Assume runtime cpu detection on arm on --target-os=android as well

Signed-off-by: Martin Storsjö <martin@martin.st>
dsputil: Split motion estimation compare bits off into their own context
Merge commit 'c23ce454b3e33634a188d6facfd2b7182af5af93'

* commit 'c23ce454b3e33634a188d6facfd2b7182af5af93':
  x86: dsputil: Coalesce all init files

Conflicts:
	libavcodec/x86/dsputil_init.c
	libavcodec/x86/dsputil_x86.h
	libavcodec/x86/motion_est.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'a578b0407dc983aecd72028e1127062689b67089'

* commit 'a578b0407dc983aecd72028e1127062689b67089':
  configure: Assume runtime cpu detection on arm on --target-os=android as well

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '2d60444331fca1910510038dd3817bea885c2367'

* commit '2d60444331fca1910510038dd3817bea885c2367':
  dsputil: Split motion estimation compare bits off into their own context

Conflicts:
	configure
	libavcodec/Makefile
	libavcodec/arm/Makefile
	libavcodec/dvenc.c
	libavcodec/error_resilience.c
	libavcodec/h264.h
	libavcodec/h264_slice.c
	libavcodec/me_cmp.c
	libavcodec/me_cmp.h
	libavcodec/motion_est.c
	libavcodec/motion_est_template.c
	libavcodec/mpeg4videoenc.c
	libavcodec/mpegvideo.c
	libavcodec/mpegvideo_enc.c
	libavcodec/x86/Makefile
	libavcodec/x86/me_cmp_init.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/me_cmp: restore author attribution and copyrights

These where removed by libav in

See: git show -C 2d60444331fca1910510038dd3817bea885c2367
diff --git a/libavcodec/dsputil.c b/libavcodec/me_cmp.c
similarity index 98%
rename from libavcodec/dsputil.c
rename to libavcodec/me_cmp.c
index ba71a99..9fcc937 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/me_cmp.c
@@ -1,8 +1,4 @@
 /*
- * DSP utils
- * Copyright (c) 2000, 2001 Fabrice Bellard
- * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
- *
  * This file is part of Libav.
  *
  * Libav is free software; you can redistribute it and/or

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>