Update dynamic-example recipe

recipes/dynamic-example/recipe.sh

 GIT=https://gitlab.redox-os.org/redox-os/dynamic-example.git
-
-function recipe_version {
-    printf "1.0.0"
-    skip=1
-}
-
-function recipe_update {
-    echo "skipping update"
-    skip=1
-}
-
-function recipe_build {
-    sysroot="$(realpath ../sysroot)"
-    export LDFLAGS="-L$sysroot/lib"
-    export CPPFLAGS="-I$sysroot/include"
-    make prefix=/
-    skip=1
-}
-
-function recipe_test {
-    echo "skipping test"
-    skip=1
-}
-
-function recipe_clean {
-    make clean
-    skip=1
-}
-
-function recipe_stage {
-    dest="$(realpath $1)"
-    make prefix=/ DESTDIR="$dest" install
-    skip=1
-}
+CARGOFLAGS="-- -C target-feature=-crt-static"