[include] move almost all of the remainder of top level includes into a subdir

Examples are include/platform.h -> platform/include/platform.h
include/target.h -> target/include/target.h

The old model generally considered these to be Always There includes,
but they're starting to stick out more and more so may as well actually
follow the model that most of the rest of the system follows.

lib/libc/include/sys/types.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2008-2012 Travis Geiselbrecht
+ *
+ * Use of this source code is governed by a MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT
+ */
+#pragma once
+
+#include <limits.h>
+#include <stdint.h>
+#include <stddef.h>
+
+typedef unsigned char uchar;
+typedef unsigned short ushort;
+typedef unsigned int uint;
+typedef unsigned long ulong;
+typedef unsigned char u_char;
+typedef unsigned short u_short;
+typedef unsigned int u_int;
+typedef unsigned long u_long;
+
+typedef long long     off_t;
+
+typedef int status_t;
+
+typedef uintptr_t addr_t;
+typedef uintptr_t vaddr_t;
+typedef uintptr_t paddr_t;
+
+typedef int kobj_id;
+
+typedef uint32_t lk_time_t;
+typedef unsigned long long lk_bigtime_t;
+#define INFINITE_TIME UINT32_MAX
+
+#define TIME_GTE(a, b) ((int32_t)((a) - (b)) >= 0)
+#define TIME_LTE(a, b) ((int32_t)((a) - (b)) <= 0)
+#define TIME_GT(a, b) ((int32_t)((a) - (b)) > 0)
+#define TIME_LT(a, b) ((int32_t)((a) - (b)) < 0)
+
+enum handler_return {
+    INT_NO_RESCHEDULE = 0,
+    INT_RESCHEDULE,
+};
+
+typedef signed long int ssize_t;
+
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+
+typedef int8_t s8;
+typedef int16_t s16;
+typedef int32_t s32;
+typedef int64_t s64;
+
+typedef uint8_t u_int8_t;
+typedef uint16_t u_int16_t;
+typedef uint32_t u_int32_t;
+typedef uint64_t u_int64_t;
+