Merge pull request scipy#9592 from tylerjereddy/add_32bit_ci

TST: Add 32-bit testing to CI

azure-pipelines.yml

@@ -7,6 +7,30 @@ trigger:
       - maintenance/*
 
 jobs:
+- job: Linux_Python_36_32bit_full
+  pool:
+    vmIMage: 'ubuntu-16.04'
+  steps:
+  - script: |
+           docker pull i386/ubuntu:bionic
+           docker run -v $(pwd):/scipy i386/ubuntu:bionic /bin/bash -c "cd scipy && \
+           apt-get -y update && \
+           apt-get -y install python3.6-dev python3-pip pkg-config libpng-dev libjpeg8-dev libfreetype6-dev && \
+           pip3 install setuptools wheel numpy cython==0.29 pytest pytest-timeout pytest-xdist pytest-env pytest-faulthandler Pillow mpmath matplotlib && \
+           apt-get -y install gfortran-5 wget && \
+           cd .. && \
+           mkdir openblas && cd openblas && \
+           wget https://3f23b170c54c2533c070-1c8a9b3114517dc5fe17b7c3f8c63a43.ssl.cf2.rackcdn.com/openblas-0.3.0-Linux-i686.tar.gz && \
+           tar zxvf openblas-0.3.0-Linux-i686.tar.gz && \
+           cp -r ./usr/local/lib/* /usr/lib && \
+           cp ./usr/local/include/* /usr/include && \
+           cd ../scipy && \
+           F77=gfortran-5 F90=gfortran-5 python3 runtests.py --mode=full -- -n auto -rsx --junitxml=junit/test-results.xml"
+    displayName: 'Run 32-bit Ubuntu Docker Build / Tests'
+  - task: PublishTestResults@2
+    inputs:
+      testResultsFiles: '**/test-*.xml'
+      testRunTitle: 'Publish test results for Python 3.6-32 bit full Linux'
 - job: Windows
   pool:
     vmIMage: 'VS2017-Win2016'