[rocprof-compute] Run roofline test on GPU 0 by default (#1390)

* rocprof-compute: Default roofline to GPU 0

Previously was running the roofline test on ALL GPUs but only
selecting the first entry in the roofline.csv. So even in default
ALL case, GPU 0 was selected.

* Update CHANGELOG.MD

* Use better wording in changelog entry

projects/rocprofiler-compute/src/argparser.py

@@ -413,9 +413,9 @@ Examples:
         "--device",
         metavar="",
         required=False,
-        default=-1,
+        default=0,
         type=int,
-        help="\t\t\tTarget GPU device ID. (DEFAULT: ALL)",
+        help="\t\t\tTarget GPU device ID. (DEFAULT: 0)",
     )
     roofline_group.add_argument(
         "--kernel-names",