WIP: Debug powerpc64le builds #626

Job	Run time
macos-aarch64	3m 12s
sdist	3m 26s
macos-x86_64	3m 15s
windows (x86_64-pc-windows-msvc, x64)	39s
linux (x86_64-unknown-linux-gnu)	2m 55s
windows (i686-pc-windows-msvc, x86)	51s
linux-arm (aarch64-unknown-linux-gnu, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	3m 10s
linux-s390x (s390x-unknown-linux-gnu, s390x)	2m 51s
linux (i686-unknown-linux-gnu)	2m 56s
linux-arm (armv7-unknown-linux-gnueabihf, armv7)	3m 13s
linux-arm (arm-unknown-linux-musleabihf, arm)	3m 11s
musllinux (x86_64-unknown-linux-musl)	3m 11s
linux-powerpc (powerpc64le-unknown-linux-gnu, ppc64le, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	3m 11s
musllinux (i686-unknown-linux-musl)	3m 13s
musllinux-cross (aarch64-unknown-linux-musl, aarch64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	8s
linux-powerpc (powerpc64-unknown-linux-gnu, ppc64, -e JEMALLOC_SYS_WITH_LG_PAGE=16)	3m 12s
musllinux-cross (armv7-unknown-linux-musleabihf, armv7)	4s
musllinux-cross (./powerpc64le-unknown-linux-musl.json, ppc64le, -e JEMALLOC_SYS_WITH_LG_PAGE=16,...	7s
	42m 45s

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