rsgislib, py-rsgislib: update to 5.1.6

[nilason]

Description

Update rsgislib, py-rsgislib to version 5.1.6.

rsgislib previously installed a version of the utility flip, which conflicted with the port of the same name.
The rsgislib's version of flip has now been renamed to rsgisflip and the conflict is now solved.

Closes: https://trac.macports.org/ticket/70213

Type(s)

• bugfix
• enhancement
• security fix

Tested on

macOS 14.5 23F79 arm64
Xcode 15.4 15F31d

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• referenced existing tickets on Trac with full URL in commit message?
• checked your Portfile with port lint --nitpick?
• tried existing tests with sudo port test?
• tried a full install with sudo port -vst install?
• tested basic functionality of all binary files?
• checked that the Portfile's most important variants haven't been broken?

[macportsbot]

Notifying maintainers:
@Veence for port rsgislib.

[nilason]

@reneeotten Thanks!