FindJPEG: Add alternative name 'libjpeg'

Newer versions of jpeglib build the .lib file on Windows with a
different name by default.  Its now called libjpeg.lib instead of
jpeg.lib.
Merge topic 'FindJPEG-new-windows-name' into next

115811dc FindJPEG: Add alternative name 'libjpeg'
FindOpenMP: ICC 15 deprecates -openmp, use -qopenmp

Intel Composer XE 2015 Beta 2 deprecates all options starting with -o
for sake of compatibility with other compilers expecting anything goes
after -o... is output file name.
Merge topic 'FindOpenMP-intel-qopenmp' into next

4671f3ab FindOpenMP: ICC 15 deprecates -openmp, use -qopenmp