quartus libprotobuf.so.14 requirement

I found the following proposed workaround in the Intel FPGA knowledge base:

https://www.intel.com/content/www/us/en/support/programmable/articles/000093063.html?wapkw=libprotobuf.so.14

The workaround proposed there would work, but it's terrible from a security standpoint in that it leaves all the file permissions fully permissive, including write permissions for all. Yikes.

A better solution is as follows:

sudo chmod -R go=u-w <install_dir>

This changes the permissions for group and others to match those of the owner, except with no write permissions. Just as easy, just as effective at solving the original problem, and much better from a security standpoint.