Update dependencies

This fixes a linkage issue that was fixed a while ago, and adds thumbv8
support.

src/test/run-make/thumb-none-qemu/example/Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Hideki Sekine <sekineh@me.com>"]
 edition = "2018"
 
 [dependencies]
-cortex-m = "0.5.4"
-cortex-m-rt = "=0.5.4"
+cortex-m = "0.6.2"
+cortex-m-rt = "0.6.11"
 panic-halt = "0.2.0"
 cortex-m-semihosting = "0.3.1"

src/test/run-make/thumb-none-qemu/example/src/main.rs

@@ -1,4 +1,3 @@
-// #![feature(stdsimd)]
 #![no_main]
 #![no_std]
 use core::fmt::Write;
@@ -6,12 +5,9 @@ use cortex_m::asm;
 use cortex_m_rt::entry;
 use cortex_m_semihosting as semihosting;
 
-//FIXME: This imports the provided #[panic_handler].
-#[allow(rust_2018_idioms)]
-extern crate panic_halt;
-
-entry!(main);
+use panic_halt as _;
 
+#[entry]
 fn main() -> ! {
     let x = 42;