Brainstorm3.command and brainstorm3.bat were not generated after executing "brainstorm compile"

[Sylvain]

Hello,
Please make sure you first consult this thread about compiling Brainstorm.

How to compile Brainstorm

Hey, brainstorm compile noplugs tested in Linux! (~6 min) There is a detail on a system call. Commit with fix. Also, in brainstorm.m@277 it is mentioned: "<2020a", but it checks for "<910" (<2021a). Which one is the correct? I ran bst_compile() in 2020b without issues.