GCC 10 build status

[Sebastian Huber]

Hello,

in order to test a patch for the removal of the bsp_specs I built all 
BSPs (POSIX and tests enabled) with GCC 10 using the new build system.

http://devel.rtems.org/ticket/3937

The situation with epiphany turned out to be quite bad:

http://devel.rtems.org/ticket/3941

There is an issue on i386:

http://devel.rtems.org/ticket/3943

There are some problems on powerpc:

https://lists.rtems.org/pipermail/devel/2020-April/059176.html

Otherwise it looks good. I was able to build with bsp_specs removed from 
the sources.