configure: Separate "ln" command line arguments

This is more compatible and not more complicated.
configure: Identify icc compiler with a less ambiguous pattern
vorbisenc: cosmetics: rename variable avccontext to avctx

This is consistent with the rest of libavcodec.
libschroedinger: cosmetics: rename variable avccontext to avctx

This is consistent with the rest of libavcodec.
vorbisdec: cosmetics: rename variable avccontext to avctx

This is consistent with the rest of libavcodec.
cmdutils: only use libavresample when it is enabled

avprobe and avserver use cmdutils and do not strictly require libavresample.
avconv: remove an unused variable
Fix a number of incorrect intmath.h #includes.
Remove unnecessary dsputil.h #includes
configure: icc: Drop nonsense adding of cpuflags to LDFLAGS

This fixes many icc warnings when not setting the CPU type.
Merge commit 'b58b00aeca21de00ab6da2944684f784d9d6bc47'

* commit 'b58b00aeca21de00ab6da2944684f784d9d6bc47':
  configure: Separate "ln" command line arguments

Conflicts:
	configure

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'e951b6d94c441d46b396ef12da1428297d77251d'

* commit 'e951b6d94c441d46b396ef12da1428297d77251d':
  vorbisdec: cosmetics: rename variable avccontext to avctx
  configure: Identify icc compiler with a less ambiguous pattern

Conflicts:
	libavcodec/vorbisdec.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'e8da807537e314d74cb6d93598f1dcfb891fa655'

* commit 'e8da807537e314d74cb6d93598f1dcfb891fa655':
  cmdutils: only use libavresample when it is enabled
  libschroedinger: cosmetics: rename variable avccontext to avctx
  vorbisenc: cosmetics: rename variable avccontext to avctx

Conflicts:
	cmdutils.c
	libavcodec/libschroedinger.c
	libavcodec/libschroedingerenc.c
	libavcodec/vorbisenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '76b19a3984359b3be44d4f7e4e69b7b86729a622'

* commit '76b19a3984359b3be44d4f7e4e69b7b86729a622':
  Fix a number of incorrect intmath.h #includes.
  avconv: remove an unused variable

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'c242bbd8b6939507a1a6fb64101b0553d92d303f'

* commit 'c242bbd8b6939507a1a6fb64101b0553d92d303f':
  Remove unnecessary dsputil.h #includes

Conflicts:
	libavcodec/ffv1.c
	libavcodec/h261dec.c
	libavcodec/h261enc.c
	libavcodec/h264pred.c
	libavcodec/lpc.h
	libavcodec/mjpegdec.c
	libavcodec/rectangle.h
	libavcodec/x86/idct_sse2_xvid.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  configure: icc: Drop nonsense adding of cpuflags to LDFLAGS

Merged-by: Michael Niedermayer <michaelni@gmx.at>
aacsbr: Silence warning: max_qmf_subbands may be used uninitialized in this function

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
swscale-test: fix 3 pointer type warnings

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