Downgrade libwayland to the version before thread safe API was introduced

This API sadly not present on older systems and we have to use the thread unsafe one if we want to be compatible with them

Telegram/build/docker/centos_env/Dockerfile

@@ -470,12 +470,12 @@ RUN git clone -b libXcomposite-0.4.5 --depth=1 {{ GIT_FREEDESKTOP }}/libxcomposi
 FROM builder AS wayland
 COPY --link --from=libffi {{ LibrariesPath }}/libffi-cache /
 
-RUN git clone -b 1.21.0 --depth=1 {{ GIT_FREEDESKTOP }}/wayland.git \
+RUN git clone -b 1.19.0 --depth=1 {{ GIT_FREEDESKTOP }}/wayland.git \
 	&& cd wayland \
+	&& sed -i "/subdir('tests')/d" meson.build \
 	&& meson build \
 		--buildtype=plain \
 		--default-library=both \
-		-Dtests=false \
 		-Ddocumentation=false \
 		-Ddtd_validation=false \
 		-Dicon_directory=/usr/share/icons \