security/doas: 5.9p1 -> 5.9p2

• fixed a bug where, when the user authenticates successfully as root, only the user's effective user id (euid) becomes zero (0). This leads to file permission errors when performing upgrades or other file-oriented operations.
• introduced gmake as a dependency as it is needed to process upstream's makefile.

PR: 210596
Submitted by: jsmith@resonatingmedia.com (maintainer)