Upload tsv earlier in remote_start_remote

In extended-remote, when GDB connects the target, but target is not
running, the TSVs are not uploaded.  When GDB attaches to a process,
the TSVs are not uploaded either.  However, GDBserver has some
builtin or predefined TSV to upload, such as $trace_timestamp.  This
bug causes $trace_timestamp is never uploaded.

gdb/

2013-06-25  Yao Qi  <yao@codesourcery.com>

        * remote.c (remote_start_remote): Move code to upload tsv
        earlier.

gdb/testsuite/

2013-06-25  Yao Qi  <yao@codesourcery.com>

	* boards/native-extended-gdbserver.exp: Set board_info
	'gdb,predefined_tsv'.
	* boards/native-gdbserver.exp: Likewise.
	* boards/native-stdio-gdbserver.exp: Likewise.
	* gdb.server/ext-attach.exp: Load trace-support.exp.  Check
	uploaded TSVs if target supports tracing.
	* gdb.trace/tsv.exp: Check uploaded TSVs if target supports
	tracing and target has predefined tsv.

gdb/doc/

2013-06-25  Yao Qi  <yao@codesourcery.com>

	* gdbint.texinfo (Testsuite): Document 'gdb,predefined_tsv'.