only build 32bit osx on build server. Catalina doesn't support buildi…#1300

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UnityAlex merged 1 commit intounity-masterfrom

unity-master-32bit-osx-buildserver-only

May 31, 2020

Commits on May 29, 2020

only build 32bit osx on build server. Catalina doesn't support building 32bit so we don't want to do this by default anymore.
UnityAlex
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