poky: reset subtree on master HEAD(a88251b3e7)

As part of the last subtree update, I used master-next as the
subtree basis because there was a fix we needed in order to get QEMU
to pass.  I didn't realize that master-next deviated (because they use
to just have short-term patches in it).  Reset the content to the same
fix but from the master branch.

Change-Id: Ic7d2f0ac42e9da3eb263586b26ba56d8798d5bcf
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/poky/scripts/lib/build_perf/report.py b/poky/scripts/lib/build_perf/report.py
index 82c5683..ab77424 100644
--- a/poky/scripts/lib/build_perf/report.py
+++ b/poky/scripts/lib/build_perf/report.py
@@ -294,7 +294,7 @@
             return "null"
         return self / 1024
 
-def measurement_stats(meas, prefix='', time=0):
+def measurement_stats(meas, prefix=''):
     """Get statistics of a measurement"""
     if not meas:
         return {prefix + 'sample_cnt': 0,
@@ -319,7 +319,6 @@
     stats['quantity'] = val_cls.quantity
     stats[prefix + 'sample_cnt'] = len(values)
 
-    start_time = time # Add start time for both type sysres and disk usage
     mean_val = val_cls(mean(values))
     min_val = val_cls(min(values))
     max_val = val_cls(max(values))
@@ -335,7 +334,6 @@
     stats[prefix + 'max'] = max_val
     stats[prefix + 'minus'] = val_cls(mean_val - min_val)
     stats[prefix + 'plus'] = val_cls(max_val - mean_val)
-    stats[prefix + 'start_time'] = start_time
 
     return stats