Add the rust std as a custom sysroot

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

@@ -0,0 +1,4 @@
+# 55a \    target_os = "survos" => { \
+#         mod survos; \
+#         pub use survos::*; \
+#     }

library/std/patches/sys/io/error/mod.sed

@@ -0,0 +1 @@
+45a \        target_os = "survos",

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

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+62a \    target_os = "survos" => { \
+        mod unsupported; \
+        pub use self::unsupported::*; \
+        mod survos; \
+        pub use self::survos::*; \
+    }

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

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+108a \target_os = "survos",
+124a \target_os = "survos",

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

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+32a \        target_os = "survos",
+
+129a \        target_os = "survos" => { \
+            // todo \
+            pub(crate) fn enable() {} \
+        }