adapt to changes in the cortex-m crate

examples/one-task.rs

macros/src/trans.rs

src/examples/_0_zero_tasks.rs

src/examples/_1_one_task.rs

src/examples/_2_two_tasks.rs

src/examples/_3_preemption.rs

src/examples/_4_nested.rs

src/examples/_5_late_resources.rs

src/examples/_6_generics.rs

src/examples/_7_full_syntax.rs

src/lib.rs