lavu: add missing log.h include in timer.h
fate: force the simple idct for xvid custom matrix test

The original test without a forced idct is still useful since it tests
the switching of the idct algorithm/permutation on x86 with MMX. MMXext
or SSE2. Make sure the test runs only if MMX inline asm is available and
force -cpuflags to all.
Add the required bitexact flag for both tests.
Merge commit 'a1e1f35203bbcbea0efb51d93e96769c826b8c64'

* commit 'a1e1f35203bbcbea0efb51d93e96769c826b8c64':
  lavu: add missing log.h include in timer.h

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

* qatar/master:
  fate: force the simple idct for xvid custom matrix test

Conflicts:
	tests/fate/xvid.mak
	tests/ref/fate/xvid-custom-matrix

See: ef034cbf185e1938000a117bd16aa6b33046f479
Merged-by: Michael Niedermayer <michaelni@gmx.at>
libfdk-aacenc: disable hard version requirements

Enable compilation on machines with an old libfdk-aac.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>