Add bootloader and kernel recipes

recipes/bootloader/recipe.sh

+GIT=https://gitlab.redox-os.org/redox-os/bootloader.git
+
+function recipe_version {
+    echo "0.1.0"
+    skip=1
+}
+
+function recipe_update {
+    echo "skipping update"
+    skip=1
+}
+
+function recipe_build {
+	nasm -f bin -o bootloader -D "ARCH_${ARCH}" -i"${ARCH}/" "${ARCH}/disk.asm"
+    skip=1
+}
+
+function recipe_test {
+    echo "skipping test"
+    skip=1
+}
+
+function recipe_clean {
+    make clean
+    skip=1
+}
+
+function recipe_stage {
+    dest="$(realpath $1)"
+    cp -v bootloader "$dest"
+    skip=1
+}

recipes/kernel/init.rc

+export PATH /bin
+export TMPDIR /tmp
+vesad T T G
+stdio display:1
+ps2d us
+pcid /etc/pcid/initfs.toml
+redoxfs --uuid $REDOXFS_UUID file
+cd file:
+export PATH file:/bin
+run.d /etc/init.d

recipes/kernel/recipe.sh

+GIT=https://gitlab.redox-os.org/redox-os/kernel.git
+BUILD_DEPENDS=(drivers init redoxfs)
+
+function recipe_build {
+    export INITFS_FOLDER="$(realpath ../sysroot)"
+    mkdir -pv "$INITFS_FOLDER/etc"
+    cp -v "$(realpath ../init.rc)" "$INITFS_FOLDER/etc/init.rc"
+    xargo rustc \
+        --lib \
+        --target "${ARCH}-unknown-none" \
+        --release \
+        -- \
+        -C soft-float \
+        -C debuginfo=2 \
+        --emit link=libkernel.a
+    "${LD}" \
+        --gc-sections \
+        -z max-page-size=0x1000 \
+        -T "linkers/${ARCH}.ld" \
+        -o kernel \
+        libkernel.a
+    "${OBJCOPY}" \
+        --only-keep-debug \
+        kernel \
+        kernel.sym
+    "${OBJCOPY}" \
+        --strip-debug \
+        kernel
+    skip=1
+}
+
+function recipe_test {
+    echo "skipping test"
+    skip=1
+}
+
+function recipe_clean {
+    make clean
+    skip=1
+}
+
+function recipe_stage {
+    dest="$(realpath $1)"
+    cp -v kernel "$dest"
+    skip=1
+}