feat(aes): add tiny-AES-c submodule

.gitmodules

@@ -4,3 +4,6 @@
 [submodule "lib/micropython/micropython-lib"]
 	path = lib/micropython/micropython-lib
 	url = https://github.com/micropython/micropython-lib.git
+[submodule "lib/tiny-AES-c/tiny-AES-c"]
+	path = lib/tiny-AES-c/tiny-AES-c
+	url = https://github.com/kokke/tiny-AES-c

bootstrap.sh

@@ -4,7 +4,8 @@ set -xe
 cd "$(dirname "$0")"
 test -d build/ && rm -r build/
 
-git submodule update --init ./lib/micropython
+# Get external libs (MicroPython, tiny-AES-c)
+git submodule update --init ./lib
 meson --cross-file card10-cross.ini build/ "$@"
 
 set +x

tiny-AES-c @ 3f69a589

+Subproject commit 3f69a5899e58e2e398e8c32ce7b3a954dd593ed4