Add fuzzy data for contain-paint-clip-015.html & contain-paint-clip-016.html (#35304)

diff --git a/css/css-contain/contain-paint-clip-015.html b/css/css-contain/contain-paint-clip-015.html
index c9ff98a..e75581c 100644
--- a/css/css-contain/contain-paint-clip-015.html
+++ b/css/css-contain/contain-paint-clip-015.html
@@ -12,6 +12,7 @@
   -->
 
   <meta content="This test checks that the paint of the descendant (a red square image) and its geometry is clipped to the padding edge of the element's principal box, taking corner clipping into account." name="assert">
+  <meta name="fuzzy" content="maxDifference=0-99;totalPixels=0-374">
 
   <!--
 
diff --git a/css/css-contain/contain-paint-clip-016.html b/css/css-contain/contain-paint-clip-016.html
index 84b2f8e..6a4b6af 100644
--- a/css/css-contain/contain-paint-clip-016.html
+++ b/css/css-contain/contain-paint-clip-016.html
@@ -12,6 +12,7 @@
   -->
 
   <meta content="This test checks that the paint of the descendant (a red square image) and its geometry is clipped to the padding edge of the element's principal box, taking corner clipping into account." name="assert">
+  <meta name="fuzzy" content="maxDifference=0-99;totalPixels=0-374">
 
   <!--