Fix soft-lock when loading non-existing files, fix wrong timer in MIPSDebugInterface #9166

Job	Run time
build-uwp	9m 22s
build-windows (x64)	10m 1s
build (ubuntu-latest, test, clang, clang++, ./b.sh --headless --unittest, clang-normal)	5m 54s
build-windows (ARM64)	9m 46s
build (ubuntu-latest, gcc, g++, ./b.sh --headless --unittest, gcc-normal)	6m 12s
build (ubuntu-latest, android, clang, clang++, cd android && ./ab.sh -j2 APP_ABI=arm64-v8a UNITTE...	11m 45s
build (ubuntu-latest, android, clang, clang++, cd android && ./ab.sh -j2 APP_ABI=armeabi-v7a UNIT...	9m 18s
build (ubuntu-latest, android, clang, clang++, cd android && ./ab.sh -j2 APP_ABI=x86_64 UNITTEST=...	12m 8s
build (ubuntu-latest, android, clang, clang++, cd android && ./ab.sh -j2 APP_ABI=arm64-v8a OPENXR...	12m 29s
build (ubuntu-latest, android, clang, clang++, ./b.sh --libretro_android ppsspp_libretro, android...	6m 15s
build (ubuntu-latest, qt, gcc, g++, ./b.sh --qt, qt)	5m 43s
build (ubuntu-latest, libretro, gcc, g++, make -C libretro -f Makefile -j2, gcc-libretro)	4m 48s
build (ubuntu-latest, libretro, clang, clang++, make -C libretro -f Makefile -j2, clang-libretro)	5m 4s
build (macos-latest, test, clang, clang++, ./b.sh --headless --unittest --fat --no-png --no-sdl2,...	27m 22s
build (macos-latest, ios, clang, clang++, ./b.sh --ios, ios)	8m 21s
test-windows	43s
test (ubuntu-latest)	1m 20s
test (macos-latest)	56s
	2h 27m 27s

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