Update clang from 11 to 14 in impl.containerfile

According to @SGSSGene to solve the issue f4pga/prjxray#2472
Clang must be updated, in this case from 11 to 14
See jbeder/yaml-cpp#1334 for more info

Thanks to Simon Gene Gottlieb

.github/impl.containerfile

@@ -1,19 +1,32 @@
+# Author:
+#   Unai Sainz-Estebanez
+# Email:
+#  <[email protected]>
+#
+# Licensed under the GNU General Public License v3.0;
+# You may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.gnu.org/licenses/gpl-3.0.html
+
 FROM ghcr.io/hdl/impl/icestorm
 
+MAINTAINER <[email protected]>
 
 RUN apt-get update -qq \
-&& apt-get install -y git \
-&& apt-get install -y python3 python3-pip python3-yaml cmake\
-&& apt-get install -y cython3 
+&& apt-get install -y git python3 python3-pip python3-yaml cmake cython3 lsb-release wget software-properties-common gnupg
 
 # Clone prjxray repository and build
 RUN git clone --recursive https://github.com/SymbiFlow/prjxray.git \
-# 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 commands should be removed)
+# According to SGSSGene's proposal (see jbeder/yaml-cpp/issues/1334), to solve the issue f4pga/prjxray/issues/2472 clang must be updated, in this case from 11 to 14
+&& apt-get purge -y clang-11 \
+&& curl -L -o llvm.sh https://apt.llvm.org/llvm.sh \
+&& chmod +x llvm.sh \
+&& ./llvm.sh 14 \
+&& cd /usr/lib/llvm-14/bin \
+&& for f in *; do rm -f /usr/bin/$f; ln -s ../lib/llvm-14/bin/$f /usr/bin/$f; done \
+&& clang --version \
+&& cd ../../../../prjxray \
 && make ALLOW_ROOT=1 build \
 && python3 setup.py install \
 && cd third_party/fasm \
@@ -43,4 +56,3 @@ RUN apt-get install -y libeigen3-dev \
 && python3 xilinx/python/bbaexport.py --device xc7a100tcsg324-1 --bba xilinx/xc7a100t.bba \
 && ./build/bba/bbasm --l xilinx/xc7a100t.bba xilinx/xc7a100t.bin \
 && cp xilinx/xc7a100t.bin /usr/local/share/nextpnr/xilinx-chipdb/ 
-