Bug 856246 - Adjust filter-very-few to adapt to varying input sizes. rs=tests

js/src/jit-test/tests/parallelarray/filter-very-few.js

@@ -1,3 +1,3 @@
 load(libdir + "parallelarray-helpers.js");
 if (getBuildConfiguration().parallelJS)
-  compareAgainstArray(range(0, minItemsTestingThreshold), "filter", function(i) { return i <= 1 || i >= 1022; });
+  compareAgainstArray(range(0, minItemsTestingThreshold), "filter", function(i) { return i <= 1 || i >= minItemsTestingThreshold - 2; });