GitLab CI: allow failure of sdl2_mixer download from macports

.gitlab/ci/jobs/macos-arm64.yml

@@ -22,7 +22,8 @@ osxcross arm64:
           # apt_development
           echo -e "\e[0Ksection_start:`date +%s`:macports_development[collapsed=true]\r\e[0KInstalling development packages"
       - osxcross-macports install --arm64 libopenmpt libxmp wavpack opusfile || osxcross-macports install --arm64 libopenmpt libxmp wavpack opusfile
-      - osxcross-macports install --static --arm64 miniupnpc curl libsdl2_mixer libpng || osxcross-macports install --static --arm64 miniupnpc curl libsdl2_mixer libpng
+      - osxcross-macports install --static --arm64 libsdl2_mixer || osxcross-macports install --static --arm64 libsdl2_mixer || true
+      - osxcross-macports install --static --arm64 miniupnpc curl libpng || osxcross-macports install --static --arm64 miniupnpc curl libpng
       - |
           # apt_development
           echo -e "\e[0Ksection_end:`date +%s`:macports_development\r\e[0K"

.gitlab/ci/jobs/macos-x86_64.yml

@@ -22,7 +22,8 @@ osxcross x86_64:
           # apt_development
           echo -e "\e[0Ksection_start:`date +%s`:macports_development[collapsed=true]\r\e[0KInstalling development packages"
       - osxcross-macports install         libopenmpt libxmp wavpack opusfile || osxcross-macports install         libopenmpt libxmp wavpack opusfile
-      - osxcross-macports install --static         miniupnpc curl libsdl2_mixer libpng || osxcross-macports install --static         miniupnpc curl libsdl2_mixer libpng
+      - osxcross-macports install --static         libsdl2_mixer || osxcross-macports install --static         libsdl2_mixer || true
+      - osxcross-macports install --static         miniupnpc curl libpng || osxcross-macports install --static         miniupnpc curl libpng
       - |
           # apt_development
           echo -e "\e[0Ksection_end:`date +%s`:macports_development\r\e[0K"