This reverts commit e61f485a, reversing
changes made to 00c47d07.

since we no longer support 32-bit Mac builds.

The old build-darwin-i386 directory name appeared in a shocking number of
files. Change CMake paths to use ${CMAKE_BINARY_DIR} -- or, when trying to
find the packages subdirectory, ${AUTOBUILD_INSTALL_DIR}. Change the rest to
at least look for build-darwin-*.

and use it for existing LLSomeClass::cleanupClass() calls.
This logs the fact of making the call, as well as making it.

ACME-1236 : Make all filters resolution independent, cleanup comments, move example filters to a sub folder in llimage_libtest

ACME-1240 : Implement convolve filter for 3x3 kernels. Implements sharpen, blur and edge detection as examples and tests.

ACME-1236 : Refactor filters and vignette into llimagefilter, add example filters to llimage_libtest

ACME-1244 : Introduced llimage/llimagefilter, refactored the filter execution code, simplified llimage_libtest filter testing

ACME-1236 : WIP : Add filter file loading and execution to llimage_libtest, suppress the a la Instagram tests as a result

ACME-1236 : WIP : Make each color correct filter use a per channel alpha argument, tweak Instagram-like test filters for discussion

ACME-1236 : WIP : Add 2 new color correction filters. Add a la Instagram composite filters for testing in llimage_libtest

ACME-1236 : WIP : Added the vignette mode. Can be applied to colorCorrect and color Transform. Added new -v argument to llimage_libtest

ACME-1236 : WIP : added all the color correction filters: colorize, linarize, equalize, contrast, brightness

ACME-1236 : WIP : add filterGamma, computeHistograms, colorCorrect, implemented filter gamma to llimage_libtest for testing

ACME-1236 : WIP : add filterRotate to rotate hue, add rotate as a valid argument to --filter in llimage_libtest

ACME-1236 : WIP : Implement saturation/desaturation transform filter, add it to llimage_libtest for testing

ACME-1236 : WIP : Implement colorTransform filter, grayscale and sepia using it, add parameter to llimage_libtest to use filters