[lnt] Allow `lnt importreport` to import hash and profile metrics.

[eladcohen]

Thanks for the review!

lnt/trunk/lnt/lnttool/import_report.py

def action_importreport(input, output, suite, order, machine):
     ctime = os.path.getctime(input.name)
     mtime = os.path.getmtime(input.name)
 
     run = lnt.testing.Run(ctime, mtime, run_info)
     report = lnt.testing.Report(machine=machine, run=run, tests=[])
 
     for line in input.readlines():
         key, val = line.split()
-        test = lnt.testing.TestSamples(suite + "." + key, [val])
+        metric = key.split(".")[1]
+        metric_type = float if metric not in ("hash", "profile") else str
+        test = lnt.testing.TestSamples(suite + "." + key, [val], conv_f = metric_type)
+
         report.tests.extend([test])
 
     output.write(report.render())

lnt/trunk/tests/lnttool/test_importreport.py

 # Testing text importing.
 #
 # RUN: echo "foo.exec 10" > input
 # RUN: echo "bar.exec 20" >> input
+# RUN: echo "foo.hash d7" >> input
+# RUN: echo "bar.profile Xz6/" >> input
 # RUN: lnt importreport --testsuite nts --order 123 --machine foo input output.json
 # RUN: cat output.json