Compile gnu-binutils with pie so it works on Redox

Because our dynamic linker still doesn't support global offset tables
and those difficult stuffs

recipes/gnu-binutils/recipe.sh

@@ -18,7 +18,7 @@ function recipe_build {
     mkdir -p "$sysroot/usr"
     ln -sf "$sysroot/include" "$sysroot/usr/include"
     ln -sf "$sysroot/lib" "$sysroot/usr/lib"
-    export CPPFLAGS="-I$sysroot/include -g"
+    export CPPFLAGS="-I$sysroot/include -pie -fPIC -g"
     export LDFLAGS="-L$sysroot/lib -static -g"
     ./configure \
         --build=${BUILD} \