kernel: separate headers into kernel and user headers

all kernel headers have been moved from include/mango to include/kernel
and include definitions that are only relevant to kernel-space.

any definitions that are relevant to both kernel- and user-space
(i.e. type definitions, syscall IDs) have been moved to
include/mango within libmango.

libmango/include/mango/syscall.h

@@ -0,0 +1,35 @@
+#ifndef MANGO_SYSCALL_H_
+#define MANGO_SYSCALL_H_
+
+#define SYS_TASK_EXIT                1
+#define SYS_TASK_CREATE              2
+#define SYS_TASK_CREATE_THREAD       3
+#define SYS_THREAD_START             30
+#define SYS_VM_OBJECT_CREATE         4
+#define SYS_VM_OBJECT_READ           5
+#define SYS_VM_OBJECT_WRITE          6
+#define SYS_VM_OBJECT_COPY           29
+#define SYS_VM_REGION_CREATE         7
+#define SYS_VM_REGION_READ           8
+#define SYS_VM_REGION_WRITE          9
+#define SYS_VM_REGION_MAP_ABSOLUTE   10
+#define SYS_VM_REGION_MAP_RELATIVE   11
+#define SYS_VM_REGION_UNMAP_ABSOLUTE 12
+#define SYS_VM_REGION_UNMAP_RELATIVE 13
+#define SYS_KERN_LOG                 14
+#define SYS_KERN_HANDLE_CLOSE        15
+#define SYS_KERN_CONFIG_GET          16
+#define SYS_KERN_CONFIG_SET          17
+#define SYS_MSG_SEND                 18
+#define SYS_MSG_RECV                 19
+#define SYS_MSG_REPLY                20
+#define SYS_MSG_READ                 21
+#define SYS_MSG_READ_HANDLES         22
+#define SYS_MSG_WRITE                23
+#define SYS_MSG_WRITE_HANDLES        24
+#define SYS_CHANNEL_CREATE           25
+#define SYS_PORT_CREATE              26
+#define SYS_PORT_CONNECT             27
+#define SYS_PORT_DISCONNECT          28
+
+#endif