graphics/flam3: Update 2.7.18 -> 3.1.1-5

Port changes:

• Use DISTVERSION
• Change to github
• Update COMMENT
• Add LICENSE/LICENSE_FILE
• Change to shared library
• Add the ad-hoc implemantation for sincos linuxism

PR: 229193
Approved by: maintainer's timeout (john.c.prather@gmail.com; 25 days)