CDK 5.0.20120323

Closes #20216.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
denominator 1.3.0

Closes #20490.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Xcode 4.6.3
gdal: use ENV.libxml2
rust: switch head branch

Closes #20492.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>