build nss using their new build system (gyp/ninja-based)

This requires installed ninja, gyp is included as source. This
allows nss be built as a parallel build, unlike the old Makefile
build system.
Since gyp internally uses python, even recursively, this requires
more complicated setup in case our internal python is used. Moreover
gyp itself seems to be kind of deprecated itself and hasn't
been ported to python3 yet, so that needs patching too.
So far only easy Unix-like systems are converted, Windows I'll
do later, the more complicated systems I'll leave to whoever
has access to them.

Change-Id: I358baad7690d2aa6df44bafa9244dc7cc828fc3f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/90115
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>

0 files changed, 0 insertions, 0 deletions