Add dynamic linking example (does not work yet)

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
+}