One cannot simply pass down a va_list to another function that expects
variable arguments ("..."). The prototype of the called functions must
expect a va_list argument instead.

This fixes segfaults that happen e.g. after compiling X11.cpp with
TEST and effectively reverts 59e829f3.

Instead of using a pragma which will be valid for the whole file this
only affects the functions where it is actually required and supresses
"format string is not a string literal" warnings.

According to GCC documentation the second attribute parameter should
be 0:

"For functions where the arguments are not available to be checked
(such as vprintf), specify the third parameter as zero".

Found via Travis CI

Fixes ArcticaProject/nx-libs#572

nxcompshad: Rewrite Logger class methods to properly take advantage of the 'gnu_printf' format attribute.

Per-file copyright notices: Update copyright information in file headers that NoMachine placed there own copyright statement in.

 Use builtin includes to build with gcc43.

This reverts commit e77bf36d.

Summary: Imported nxcompshad-3.5.0-2.tar.gz
Keywords:

Imported nxcompshad-3.5.0-2.tar.gz
into Git repository

Summary: Imported nxcompshad-3.4.0-3.tar.gz
Keywords:

Imported nxcompshad-3.4.0-3.tar.gz
into Git repository

Summary: Imported nxcompshad-3.1.0-2.tar.gz
Keywords:

Imported nxcompshad-3.1.0-2.tar.gz
into Git repository