Pass convenience options to Make invoked via CMake

Can't pass them to plain Make invocations,
because we try to be compatible with macOS' old Make.

.github/workflows/create-release-artifacts.yml

@@ -61,7 +61,7 @@ jobs:
       - name: Build binaries
         run: |
           cmake -S . -B build --preset macos-static -DFETCHCONTENT_BASE_DIR="${{ env.DEPS_ROOT_DIR }}"
-          cmake --build build
+          cmake --build build -- --output-sync --keep-going
           strip rgb{asm,link,fix,gfx}
         env:
           LDFLAGS: -fuse-ld=lld # cmake/macos-static.cmake comments explain why we use lld.