Fix building of libstd

.gitignore

+build

cook.sh

+export RUST_TARGET_PATH=`realpath targets`
+export RUSTFLAGS="--cfg redox"
+TARGET=x86_64-unknown-redox
+
+set -e
+
+if [ -n "$1" ]
+then
+    if [ -d "recipes/$1" ]
+    then
+        pushd "recipes/$1"
+        source recipe.sh
+        case "$2" in
+            build)
+                pushd build
+                xargo build --target "$TARGET"
+                popd
+                ;;
+            clean)
+                pushd build
+                xargo clean
+                popd
+                ;;
+            fetch)
+                git clone --recursive "$GIT" build
+                ;;
+            unfetch)
+                rm -rf build
+                ;;
+            update)
+                pushd build
+                xargo update
+                popd
+                ;;
+            *)
+                echo "$0 {package} {build|clean|fetch|update}"
+                ;;
+        esac
+        popd
+    else
+        echo "$0: recipe '$1' not found"
+    fi
+else
+    echo "$0 {package} {build|clean|fetch|update}"
+fi

recipes/libstd/recipe.sh

+GIT=https://github.com/redox-os/libstd.git

recipes/smith/recipe.sh

+GIT=https://github.com/IGI-111/Smith.git