[seL4] [PATCH] trivial: remove redundant newline in fail() calls.

Hello,

I have noticed certain fail() calls include newline. This does not seem necessary since fail() is defined as printf( "seL4 called fail at %s:%u in function %s, saying "%s"\n", file, line, function, s );

Which causes affected error messages to contain a single " character on a new line.

Patch attached.

Regards, Eduard Nicodei