ARROW-153 pkg-config is missing in GitHub Actions MacOS Runner (#131)

Author: blink1073

.github/workflows/benchmark.yml

@@ -32,6 +32,8 @@ jobs:
         run: |
           mkdir data
           mongod --fork --dbpath=$(pwd)/data --logpath=$PWD/mongo.log
+      - name: Install pkg-config
+        run: brew install pkg-config
       - name: Install libbson
         run: |
           LIBBSON_INSTALL_DIR=$(pwd)/libbson ./build-libbson.sh

.github/workflows/release-python.yml

@@ -55,6 +55,10 @@ jobs:
         with:
           platforms: all
 
+      - name: Install pkg-config on MacOS
+        if: runner.os == 'macOS'
+        run: brew install pkg-config
+
       - name: Install cibuildwheel
         run: python -m pip install "cibuildwheel>=2.4,<3"
 

.github/workflows/test-python.yml

@@ -59,6 +59,8 @@ jobs:
         run: |
           mkdir data
           mongod --fork --dbpath=$(pwd)/data --logpath=$PWD/mongo.log
+          # Install pkg-config
+          brew install pkg-config
       - name: Start MongoDB on Windows
         if: ${{ startsWith(runner.os, 'Windows') }}
         shell: powershell