[php-src] Issue #14688: makedist script does not handle non-GNU systems correctly

Issue: https://github.com/php/php-src/issues/14688 Author: NattyNarwhal ### Description While it does mandate GNU tar and checks for it correctly, it: * Seems to use touch in a manner that confuses macOS touch. Oddly, the date it passes looks valid for the format, so I'm not sure why it complains. * Does not check for the proper md5(sum) binary, assuming the GNU coreutils name of md5sum, when on macOS and BSD systems, it's md5. For example: ``` [...] makedist: Resetting the modification and access times of package files to 2024-06-27T10:26:23-03:00 touch: out of range or illegal time specification: YYYY-MM-DDThh:mm:SS[.frac][tz] makedist: Creating php-8.4.0alpha1test.tar archive. makedist: Creating php-8.4.0alpha1test.tar.gz archive. ./scripts/dev/makedist: line 184: md5sum: command not found makedist: Creating php-8.4.0alpha1test.tar.bz2 archive. ./scripts/dev/makedist: line 192: md5sum: command not found makedist: Creating php-8.4.0alpha1test.tar.xz archive. ./scripts/dev/makedist: line 200: md5sum: command not found makedist: Cleaning up. makedist: All done. ``` ### PHP Version PHP 8.4.0-dev ### Operating System macOS 14.5