package/libgeos: new package

GEOS (Geometry Engine - Open Source) is a C++ port of the JTS Topology
Suite (JTS). It aims to contain the complete functionality of JTS in
C++. This includes all the OpenGIS Simple Features for SQL spatial
predicate functions and spatial operators, as well as specific JTS
enhanced functions.

https://trac.osgeo.org/geos



Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
[yann.morin.1998@free.fr:
  - wrap long lines in Config.in
  - wrap long lines in commit log
  - drop "invsible characters" <200b>
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>