gnu: qtbase: Update to 6.3.1.

gnu: qtbase: Update to 6.3.1.

* gnu/packages/qt.scm (qtbase): Update to 6.3.1.
[cmake]: Delete commented out argument.
[configure-flags]: Add -DFEATURE_system_xcb_xinput=ON.
[phases]: Use gexps.
{patch-more-paths}: Use search-input-file.  Patch /bin/ls.
{patch-mkspecs}: Use search-input-directory and search-input-file.
[native-inputs]: Rewrite with modify-inputs.  Replace gtk+ with gtk.  Remove
xorg-server-for-tests.
[inputs]: Override field to extend with bash-minimal, libxcb and md4c.
replace gtk+ with gtk.  Use latest postgresql.
Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>