oe-build-perf-test: implement --globalres-file option

Using this option the script appends test results into a 'global results
file'. A CSV-formatted output of the results. This option is to provide
compatibility with the old build-perf-test.sh.

(From OE-Core rev: e9f18e63220e452f2b0c878998e57d944ae83980)

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/oe-build-perf-test

@@ -70,6 +70,8 @@ def parse_args(argv):
 
     parser.add_argument('-D', '--debug', action='store_true',
                         help='Enable debug level logging')
+    parser.add_argument('--globalres-file',
+                        help="Append results to 'globalres' csv file")
 
     return parser.parse_args(argv)
 
@@ -94,6 +96,9 @@ def main(argv=None):
     # Run actual tests
     runner = BuildPerfTestRunner(out_dir)
     ret = runner.run_tests()
+    if not ret:
+        if args.globalres_file:
+            runner.update_globalres_file(args.globalres_file)
 
     return ret