temp fix for 12-master ( #192 )

[ImreSamu]

steps:

• [x] travis: allow_failures for VERSION=12-master
  • as I see this is working : travis-ci-jobs-686864493 ( see the bottom )
• [x] fix rm: cannot remove '/usr/local/lib/libSFCGAL.la': No such file or directory travis-ci-jobs-686381262
  • Warning: this is a quick fix .. without understanding the root case
• [x] update 12-master
  • "performance with large geometries" and other improvements https://twitter.com/Algunenano/status/1256271554046033921
  • summary: https://github.com/postgis/postgis/blob/master/NEWS
• [x] testing
  • my (local) minimal test OK.

# SELECT PostGIS_Full_Version();
                                                                               postgis_full_version                                                                                
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 POSTGIS="3.1.0dev 4c185f8" [EXTENSION] PGSQL="120" GEOS="3.9.0dev-CAPI-1.14.0" PROJ="7.1.0" LIBXML="2.9.4" LIBJSON="0.12.1" LIBPROTOBUF="1.3.1" WAGYU="0.5.0 (Internal)" TOPOLOGY
(1 row)

# SELECT PostGIS_Version();
            postgis_version            
---------------------------------------
 3.1 USE_GEOS=1 USE_PROJ=1 USE_STATS=1
(1 row)

[ImreSamu]

Ready for review.

[smellman]

I added rm /usr/local/lib/libSFCGAL.la. This fixes libtoolize error: it return invalid version without removing libSFCGDAL.la. https://github.com/Oslandia/SFCGAL/issues/215 I think upstream fixed it.

[phillipross]

Looks good. All of my local testing seems fine too. And I'm happy to learn of travis per-environment allow failures feature 😉