Introduce common-types.h

This introduces common-types.h.  This file defines various standard
types used by gdb and gdbserver.

Currently these types are conditionally defined based on GDBSERVER.
The long term goal is to remove all such tests; however, this is
difficult as currently gdb uses definitions from BFD.  In the meantime
this is still a step in the right direction.

gdb/ChangeLog:

	* common/common-types.h: New file.
	* Makefile.in (HFILES_NO_SRCDIR): Add common/common-types.h.
	* common/common-defs.h: Include common-types.h.
	* defs.h (gdb_byte, CORE_ADDR, CORE_ADDR_MAX, LONGEST)
	(ULONGEST): Remove.

gdb/gdbserver/ChangeLog:

	* server.h: Add static assertion.
	(gdb_byte, CORE_ADDR, LONGEST, ULONGEST): Remove.

gdb/gdbserver/server.h

@@ -21,6 +21,8 @@
 
 #include "common-defs.h"
 
+gdb_static_assert (sizeof (CORE_ADDR) >= sizeof (void *));
+
 #ifdef __MINGW32CE__
 #include "wincecompat.h"
 #endif
@@ -63,19 +65,8 @@ int vsnprintf(char *str, size_t size, const char *format, va_list ap);
 #  define PROG "gdbserver"
 #endif
 
-/* A type used for binary buffers.  */
-typedef unsigned char gdb_byte;
-
 #include "buffer.h"
 #include "xml-utils.h"
-
-/* FIXME: This should probably be autoconf'd for.  It's an integer type at
-   least the size of a (void *).  */
-typedef unsigned long long CORE_ADDR;
-
-typedef long long LONGEST;
-typedef unsigned long long ULONGEST;
-
 #include "regcache.h"
 #include "gdb_signals.h"
 #include "target.h"