WIP: Debug powerpc64le builds #619

Job	Run time
macos-x86_64	9m 46s
linux (x86_64-unknown-linux-gnu)	8m 20s
macos-aarch64	10m 3s
sdist	9m 33s
linux (i686-unknown-linux-gnu)	10m 35s
linux-arm (aarch64-unknown-linux-gnu, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	10m 47s
windows (x86_64-pc-windows-msvc, x64)	10m 56s
linux-arm (armv7-unknown-linux-gnueabihf, armv7)	10m 53s
windows (i686-pc-windows-msvc, x86)	10m 56s
linux-arm (arm-unknown-linux-musleabihf, arm)	10m 26s
linux-s390x (s390x-unknown-linux-gnu, s390x)	10m 32s
musllinux (x86_64-unknown-linux-musl)	10m 1s
linux-powerpc (powerpc64le-unknown-linux-gnu, ppc64le, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	10m 57s
musllinux-cross (aarch64-unknown-linux-musl, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	10m 54s
musllinux (i686-unknown-linux-musl)	9m 49s
linux-powerpc (powerpc64-unknown-linux-gnu, ppc64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	10m 53s
musllinux-cross (armv7-unknown-linux-musleabihf, armv7)	10m 5s
musllinux-cross (powerpc64le-unknown-linux-musl, ppc64le, -e JEMALLOC_SYS_WITH_LG_PAGE=16, nightl...	7m 9s
	3h 2m 35s

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