scripts: use extended-remote for greater compatibility

Plain "remote" results in failure to connect using the gdb built with
the toolchain. (On atheros target at least)  extended-remote also allows
"run" to restart the target process.

Signed-off-by: Karl Palsson <karlp@remake.is>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43596 3c298f89-4303-0410-b956-a3cf2f4a3e73

scripts/remote-gdb

@@ -61,7 +61,7 @@ if( opendir SD, "$Bin/../staging_dir" )
 		my ($sysroot) = glob("$Bin/../staging_dir/target-${arch}_${libc}/root-*/");
 
 		print $fh "set sysroot $sysroot\n" if $sysroot;
-		my $cmd = "target remote";
+		my $cmd = "target extended-remote";
 		-f $ARGV[0] and $cmd = "core-file";
 		print $fh "$cmd $ARGV[0]\n";