Fixes #5657

This is in preparation for soon deprecation of Xcode 8 image:
https://blog.travis-ci.com/2017-10-16-a-new-default-os-x-image-is-coming

- Feature: [#1399 (partial), #5177] Add window that displays any missing/corrupt objects when loading a park
- Feature: [#5056] Add cheat to own all land.
- Feature: [#5133] Add option to display guest expenditure (as seen in RCTC).
- Feature: [#5196] Add cheat to disable ride ageing.
- Feature: [#5504] Group vehicles into ride groups
- Feature: [#5576] Add a persistent 'display real names of guests' setting.
- Feature: [#5611] Add support for Android
- Feature: [#5706] Add support for OpenBSD
- Feature: OpenRCT2 now starts up on the display it was last shown on.
- Feature: Park entrance fee can now be set to amounts up to £200.
- Improved: Construction rights can now be placed on park entrances.
- Improved: Mouse can now be dragged to select scenery when saving track designs
- Fix: [#259] Money making glitch involving swamps (original bug)
- Fix: [#441] Construction rights over entrance path erased (original bug)
- Fix: [#578] Ride ghosts show up in ride list during construction (original bug)
- Fix: [#597] 'Finish 5 roller coasters' goal not properly checked (original bug)
- Fix: [#667] Incorrect banner limit calculation (original bug)
- Fix: [#739] Crocodile Ride (Log Flume) never allows more than five boats (original bug)
- Fix: [#837] Can't move windows on title screen to where the toolbar would be (original bug)
- Fix: [#1705] Time Twister's Medieval entrance has incorrect scrolling (original bug)
- Fix: [#3178, #5456] Paths with non-ASCII characters not handled properly on macOS.
- Fix: [#3346] Crash when extra long train breaks down at the back
- Fix: [#3479] Building in pause mode creates too many floating numbers, crashing the game
- Fix: [#3565] Multiplayer server crash
- Fix: [#3681] Steel Twister rollercoaster always shows all track designs
- Fix: [#3846, #5749] Crash when testing coaster with a diagonal lift in block brake mode
- Fix: [#4054] Sorting rides by track type: Misleading research messages
- Fix: [#4055] Sort rides by track type: Sorting rule is not really clear (inconsistent?)
- Fix: [#4512] Invisible map edge tiles corrupted
- Fix: [#5009] Ride rating calculations can overflow
- Fix: [#5253] RCT1 park value conversion factor too high
- Fix: [#5400] New Ride window does not focus properly on newly invented ride.
- Fix: [#5489] Sprite index crash for car view on car ride.
- Fix: [#5730] Unable to uncheck 'No money' in the Scenario Editor.
- Fix: [#5750] Game freezes when ride queue linked list is corrupted.
- Fix: [#5819] Vertical multi-dimension coaster tunnels drawn incorrectly
- Fix: Non-invented vehicles can be used via track designs in select-by-track-type mode.
- Fix: Track components added by OpenRCT2 are now usable in older scenarios.
- Technical: [#5047] Add ride ratings tests
- Technical: [#5458] Begin offering headless build with reduced compile- and run-time dependencies
- Technical: [#5755] Title sequence wait periods use milliseconds
- Technical: Fix many desync sources

Fixes #5720

Which set rpath to $ORIGIN so it can be run out the box.

This also adds `-k` to flags, which makes `make` not bail out on first
error, but rather continue compilation.

Mostly because I don't want to update all the libs right now