[Fuchsia] Replace list.map with list comprehension

Updated the script to use list comprehension, which is supported
on all versions of python above 2.0

TBR=wez@chromium.org

Change-Id: I8f7ffad323c40a51e77374c8baba40ebbf463061
Reviewed-on: https://chromium-review.googlesource.com/900132Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534170}

build/fuchsia/runner_v2/remote_cmd.py

@@ -88,7 +88,7 @@ def RunScp(config_path, host, port, sources, dest, direction):
   if direction == COPY_TO_TARGET:
     dest = "%s:%s" % (host, dest)
   else:
-    sources = sources.map(lambda source : "%s:%s" % (host, source))
+    sources = ["%s:%s" % (host, source) for source in sources]
 
   scp_command += ['-F', config_path, '-P', str(port)]
   scp_command += sources