testing/libretro-scummvm: fix build on loongarch64

Signed-off-by: Weijie Wang wangweijie@loongson.cn

assigned to @markand

added 300 commits

• d6572468...fa62c4ed - 299 commits from branch alpine:master
• fa85ca26 - testing/libretro-scummvm: fix build on loongarch64

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merged