add matrix to test 32-bit cygwin also

Author: jeremyd2019

.github/workflows/ci.yml

@@ -40,11 +40,16 @@ jobs:
   Cygwin:
     name: Cygwin
     runs-on: windows-latest
+    strategy:
+      matrix:
+        include:
+          - { platform: x86_64, hosttype: cygwin.i386-64 }
+          - { platform: x86,    hosttype: cygwin.i386    }
     env:
       CHERE_INVOKING: 1
       CYGWIN_NOWINPATH: 1
       CC: gcc
-      HOSTTYPE: cygwin.i386-64
+      HOSTTYPE: ${{ matrix.hosttype }}
     defaults:
       run:
         shell: bash -leo pipefail -o igncr {0}
@@ -54,7 +59,8 @@ jobs:
     - name: Install Cygwin
       uses: cygwin/cygwin-install-action@master
       with:
-        packages: gcc-core gcc-g++ git libiconv-devel ncurses
+        platform: ${{ matrix.platform }}
+        packages: gcc-core git libiconv-devel ncurses
     - name: Git reset
       run: |
         git config --global --add safe.directory "$(pwd)" && git reset --hard