configure: enable lto for icl compiler.
swresample/resample_template: flip order of operations in swri_resample_linear() for 32bit

Fixes integer overflow

Found-by: BBB
Reviewed-by: "Ronald S. Bultje" <rsbultje@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'cehoyos/master'

* cehoyos/master:
  configure: enable lto for icl compiler.

Merged-by: Michael Niedermayer <michaelni@gmx.at>
dynamic loading of shared faac library
dynamic loading of shared fdk-aac library
avfilters: better behavior of frei0r on win32
programs: print version info and configuration only on -version
configure: fix modplug detection (it needs +lstdc++)
no Werror on implicit-function-declaration and missing-prototypes
removed c99 loop var decl
custom icon and windows resource
use upstream version tag, my repo is always rebased