Change io crate & add a small shell

library/std/patches/sys/args/mod.sed

@@ -1,4 +1,5 @@
-# 55a \    target_os = "survos" => { \
-#         mod survos; \
-#         pub use survos::*; \
-#     }
+55a \    target_os = "survos" => { \
+        mod survos; \
+        pub use survos::*; \
+    }
+12a \    target_os = "survos",

library/std/patches/sys/fd/mod.sed

@@ -0,0 +1,4 @@
+21a \    target_os = "survos" => { \
+        mod survos; \
+        pub use survos::*; \
+    }

library/std/patches/sys/fs/mod.sed

@@ -0,0 +1,4 @@
+47a \    target_os = "survos" => { \
+        mod survos; \
+        use survos as imp; \
+    }

library/std/patches/sys/process/mod.sed

@@ -0,0 +1,4 @@
+17a \    target_os = "survos" => { \
+        mod survos; \
+        use survos as imp; \
+    }