link.h: expose glibc/svr4 dynlinker debugging glue

this is already implemented in the dynliker (see struct debug),
but was not exposed.
we need it to do so to make wine happy...

include/link.h

@@ -3,6 +3,7 @@
 
 #include <elf.h>
 #define __NEED_size_t
+#define __NEED_uint32_t
 #include <bits/alltypes.h>
 
 #if UINTPTR_MAX > 0xffffffff
@@ -11,6 +12,9 @@
 #define ElfW(type) Elf32_ ## type
 #endif
 
+/* this is the same everywhere except alpha and s390 */
+typedef uint32_t Elf_Symndx;
+
 struct dl_phdr_info {
 	ElfW(Addr) dlpi_addr;
 	const char *dlpi_name;
@@ -22,6 +26,21 @@ struct dl_phdr_info {
 	void *dlpi_tls_data;
 };
 
+struct link_map {
+	ElfW(Addr) l_addr;
+	char *l_name;
+	ElfW(Dyn) *l_ld;
+	struct link_map *l_next, *l_prev;
+};
+
+struct r_debug {
+	int r_version;
+	struct link_map *r_map;
+	ElfW(Addr) r_brk;
+	enum { RT_CONSISTENT, RT_ADD, RT_DELETE } r_state;
+	ElfW(Addr) r_ldbase;
+};
+
 int dl_iterate_phdr(int (*)(struct dl_phdr_info *, size_t, void *), void *);
 
 #endif