loader: Miscellaneous platform-specific fixes #5

Job	Run time
codegen	12s
iOS	3m 0s
chromium	1m 28s
tvOS	58s
linux (gcc, g++, Debug, ubuntu-20.04)	4m 39s
linux-32-no-asm	2m 22s
linux (gcc, g++, Debug, ubuntu-22.04)	3m 39s
linux-32 (Debug)	1m 51s
linux (gcc, g++, Release, ubuntu-20.04)	6m 7s
linux-32 (Release)	2m 1s
linux-no-asm	3m 8s
linux (gcc, g++, Release, ubuntu-22.04)	6m 22s
linux (clang, clang++, Debug, ubuntu-20.04)	1m 59s
mac (Debug, APPLE_STATIC_LOADER=ON)	5m 27s
Universal Binary Testing (STATIC ON) w/ Ninja	3m 58s
mac (Debug, APPLE_STATIC_LOADER=OFF)	5m 32s
Universal Binary Testing (STATIC ON) w/ Xcode	7m 37s
mac (Release, APPLE_STATIC_LOADER=ON)	5m 43s
linux (clang, clang++, Debug, ubuntu-22.04)	2m 40s
Universal Binary Testing (STATIC OFF) w/ Ninja	4m 16s
mac (Release, APPLE_STATIC_LOADER=OFF)	5m 50s
linux (clang, clang++, Release, ubuntu-20.04)	4m 32s
Universal Binary Testing (STATIC OFF) w/ Xcode	6m 38s
linux (clang, clang++, Release, ubuntu-22.04)	4m 49s
mingw	3m 38s
mingw-no-asm	1m 9s
mingw-no-asm-explicit	54s
windows_clang (clang, Debug)	3m 45s
windows_clang (clang, Release)	3m 28s
windows_vs (Win32, Debug)	4m 41s
windows_vs-no-asm (Win32)	3m 15s
windows_clang (clang-cl, Debug)	5m 16s
windows_vs (Win32, Release)	4m 21s
windows_vs-no-asm (x64)	3m 58s
windows_clang (clang-cl, Release)	4m 42s
windows_vs (x64, Debug)	4m 7s
windows_vs (x64, Release)	5m 0s
	2h 23m 2s

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