* gnu/packages/patches/nss-3.56-pkgconfig.patch: Update and ajdust.
* gnu/packages/patches/nss-increase-test-timeout.patch: Adjust.
* gnu/packages/nss.scm (nss)[version]: Compute with the git-version procedure.
[source]: Switch to use the latest changeset. Adjust snippet to match
restructuring of the source file hierarchy.
[make-flags]: Do not chdir to the "nss" directory.
[phases]: Delete trailing #t.
{check}: Honor the '#:tests?' argument. Update the date used with faketime
and adjust for the new all.sh script location.
{install}: Adapt to the location of the 'dist/' directory, which is now at the
same level as the 'source' checkout.
* gnu/packages/patches/nss-increase-test-timeout.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/gnuzilla.scm (nss)[source]: Use it.
