Use ccache on macos-cmake CI jobs

.github/workflows/ci.yml

@@ -155,6 +155,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v1
+      - name: ccache
+        uses: hendrikmuhs/ccache-action@v1
+        with:
+          key: macos
       - name: Build OpenRCT2
         run: |
           brew install ninja

scripts/setenv

@@ -52,6 +52,7 @@ realpath() {
 }
 scriptsdir="$(realpath "$(dirname "${BASH_SOURCE[0]}")")"
 export PATH="$scriptsdir:$PATH"
+export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
 
 # Output all the variables
 if [[ "$1" != "-q" ]]; then