raspi chess players: xboard and scid-vs-pc to fix?

[acconciox]

hi, for chess players (also online) these are 2 good tools,

1) xboard
repo install 4.8
community/xboard 4.8.0-2
Graphical user interfaces for chessbut
the good src is 4.9 from here:
http://git.savannah.gnu.org/cgit/xboard.git
the 4.9 version
2)
scidvspc seems that with armv7 there are problems related to gcc 6 to compile it:
https://sourceforge.net/p/scidvspc/tickets/1/

To solve this problem I changed Makefile line: WARNINGS =-Wall to
WARNINGS =-Wno-narrowing