Backport PR#127 PR#144. Update mmtk-core. #390

Job	Run time
binding-tests (Immix, Default) / build-test-LinearAlgebra	1h 40m 16s
binding-tests (Immix, Default) / build-test-stdlib	49m 24s
binding-tests (Immix, Default) / build-debug	25m 5s
binding-tests (Immix, Default) / build-test-other	1h 43m 17s
binding-tests (Immix, Non_Moving) / build-debug	22m 0s
binding-tests (Immix, Non_Moving) / build-test-LinearAlgebra	1h 38m 32s
binding-tests (Immix, Non_Moving) / build-test-other	1h 43m 30s
binding-tests (Immix, Non_Moving) / build-test-stdlib	48m 43s
binding-tests (StickyImmix, Default) / build-debug	19m 51s
binding-tests (StickyImmix, Default) / build-test-LinearAlgebra	1h 18m 39s
binding-tests (StickyImmix, Default) / build-test-other	1h 41m 5s
binding-tests (StickyImmix, Default) / build-test-stdlib	49m 21s
binding-tests (StickyImmix, Non_Moving) / build-debug	19m 1s
binding-tests (StickyImmix, Non_Moving) / build-test-LinearAlgebra	1h 23m 16s
binding-tests (StickyImmix, Non_Moving) / build-test-other	1h 41m 50s
binding-tests (StickyImmix, Non_Moving) / build-test-stdlib	49m 58s
	17h 33m 48s

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