Add sysroots of Debian 10 and 11 #91

Job	Run time
Native build	5s
Cross build (ia64-unknown-linux-gnu)	1m 27s
Cross build (alpha-unknown-linux-gnu)	1m 28s
Cross build (x86_64-unknown-linux-gnu)	1m 26s
Cross build (i386-unknown-linux-gnu)	1m 27s
Cross build (arm-unknown-linux-gnueabi)	1m 28s
Cross build (arm-unknown-linux-gnueabihf)	1m 27s
Cross build (hppa-unknown-linux-gnu)	1m 28s
Cross build (aarch64-unknown-linux-gnu)	1m 27s
Cross build (mips-unknown-linux-gnu)	1m 28s
Cross build (mipsel-unknown-linux-gnu)	1m 26s
Cross build (powerpc-unknown-linux-gnu)	1m 27s
Cross build (s390-unknown-linux-gnu)	1m 27s
Cross build (s390x-unknown-linux-gnu)	1m 27s
Cross build (sparc-unknown-linux-gnu)	1m 26s
Cross build (powerpc64le-unknown-linux-gnu)	1m 26s
Cross build (mips64el-unknown-linux-gnuabi64)	1m 28s
	23m 18s

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