Move xargo home to xargo, use cross compiler

.cargo/config

@@ -1,3 +1,3 @@
 [target.x86_64-unknown-redox]
-linker = "libc-artifacts/gcc.sh"
+linker = "x86_64-elf-redox-gcc"
 rustflags = []

.gitignore

@@ -7,4 +7,4 @@ stage.sig
 stage.tar
 stage.tar.gz
 stage.toml
-xargo-home
+xargo

clean.sh

@@ -15,4 +15,4 @@ do
     ./cook.sh "$recipe" distclean
 done
 
-rm -rf xargo-home
+rm -rf xargo

config.sh

@@ -7,5 +7,5 @@ export TARGET=x86_64-unknown-redox
 # Automatic variables
 ROOT="$(cd `dirname "$0"` && pwd)"
 REPO="$ROOT/repo/$TARGET"
-export CC="$ROOT/libc-artifacts/gcc.sh"
-export XARGO_HOME="$ROOT/xargo-home"
+export CC="x86_64-elf-redox-gcc"
+export XARGO_HOME="$ROOT/xargo"