docker: add meson for CI

Change-Id: I1e8e88f993d8fa66224ea1bcd48d6e9fbcb39d5e

docker/Dockerfile_ubuntu_18.04

@@ -68,13 +68,18 @@ RUN add-apt-repository universe && \
         libsecp256k1-dev \
         libasio-dev \
         libexpat1 libexpat1-dev \
-        lcov gcovr
+        lcov gcovr \
+        ninja-build
 
 RUN update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 50
 RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 50
 
 RUN ls -la /usr/include/c++/8/charconv
 
+RUN apt-get install -y python3 python3-pip python3-setuptools \
+                       python3-wheel
+RUN pip3 install meson
+
 # Tests framework
 RUN apt-get install -y -o Acquire::Retries=10 \
         libcppunit-dev \

docker/Dockerfile_ubuntu_20.04

@@ -72,7 +72,12 @@ RUN add-apt-repository universe && \
         libsecp256k1-dev \
         libasio-dev \
         libexpat1 libexpat1-dev \
-        lcov gcovr
+        lcov gcovr \
+        ninja-build
+
+RUN apt-get install -y python3 python3-pip python3-setuptools \
+                       python3-wheel
+RUN pip3 install meson
 
 RUN ls -la /usr/include/c++/8/charconv