buildperf/base.py: skip reduced_proc_pressure directory

Buildperf was designed to skip all non-directories under buildstats, i.e. proc
log files. With the /proc/pressure stats being collected in a new directory,
the following error was seen:
	meta/lib/oeqa/buildperf/base.py", line 392, in split_nevr
    	n_e_v, revision = nevr.rsplit('-', 1)
	ValueError: not enough values to unpack (expected 2, got 1)

Add an additional check to skip the reduced_proc_pressure directory.

(From OE-Core rev: d3a25dd7aa63ab98c8bb931b4b3bc61807806ed3)

Signed-off-by: Aryaman Gupta <aryaman.gupta@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/buildperf/base.py

@@ -444,7 +444,7 @@ class BuildPerfTestCase(unittest.TestCase):
         buildstats = []
         for fname in os.listdir(bs_dir):
             recipe_dir = os.path.join(bs_dir, fname)
-            if not os.path.isdir(recipe_dir):
+            if not os.path.isdir(recipe_dir) or fname == "reduced_proc_pressure":
                 continue
             name, epoch, version, revision = split_nevr(fname)
             recipe_bs = OrderedDict((('name', name),