Temporary fix to build impl-arty without errors

As mentioned in the issue f4pga/prjxray#2472
a new library recently added to the yaml-cpp repository called dragonbox.h
breaks the building of the prjxray.

To fix this issue I've move the yaml-repository to old commit
and I've commented out line 42 of the makefile to not perform the init
of the submodules

.github/impl.containerfile

@@ -8,7 +8,12 @@ RUN apt-get update -qq \
 
 # Clone prjxray repository and build
 RUN git clone --recursive https://github.com/SymbiFlow/prjxray.git \
-&& cd prjxray \
+# Temporary fix as a consequence of the issue https://github.com/f4pga/prjxray/issues/2472
+&& cd prjxray/third_party/yaml-cpp \
+&& git checkout 84459a7f982ea4d10e943237b2e9c71afdab6a45 \
+&& cd ../.. \
+&& sed -i '42s/^/#/' Makefile \
+# (When the issue is fixed these three of commands should be removed)
 && make ALLOW_ROOT=1 build \
 && python3 setup.py install \
 && cd third_party/fasm \