Makefile: try to install python-is-python3 package as needed
Makefile: try to install python-is-python3 package as needed

Since some scripts are executed using "python", create a symlink when "python3" exists
and "python" does not exist, by installing python-is-python3 package.

  /bin/sh: 1: python: not found
  make[2]: *** [Makefile:364: check_links] Error 127

xairy/syzkaller,google/syzkaller,google/syzkaller,google/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller