configure: Add detected C library and host compiler to informative output
configure: Detect msvcrt libc with a CPP check instead of a link check

Simplifies host/target libc detection splitting.
Merge commit '5ec467328122b80fac94c2d5e3e7540d50381868'

* commit '5ec467328122b80fac94c2d5e3e7540d50381868':
  configure: Add detected C library and host compiler to informative output

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

* qatar/master:
  configure: Detect msvcrt libc with a CPP check instead of a link check

Conflicts:
	configure

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/cabac: force get_cabac to be not inlined

works around bug in gccs inline asm register assignment
Fixes Ticket3177

gcc from 4.4 to 4.6 is affected at least, no non affected gccs known
clang seems not affected

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