Condense test dirs for rc3.

test cases/warning/9 target with no sources/meson.build

diff --git a/test cases/warning/8 target with no sources/meson.build b/test cases/warning/9 target with no sources/meson.build
similarity index 100%
rename from test cases/warning/8 target with no sources/meson.build
rename to test cases/warning/9 target with no sources/meson.build

test cases/warning/9 target with no sources/test.json

diff --git a/test cases/warning/8 target with no sources/test.json b/test cases/warning/9 target with no sources/test.json
similarity index 100%
rename from test cases/warning/8 target with no sources/test.json
rename to test cases/warning/9 target with no sources/test.json