Merge pull request #16523 from huonw/conditionalize-float80

[test] Float80 only exists on some platforms.
diff --git a/validation-test/stdlib/Random.swift b/validation-test/stdlib/Random.swift
index 5df0477..0acbd2e 100644
--- a/validation-test/stdlib/Random.swift
+++ b/validation-test/stdlib/Random.swift
@@ -128,7 +128,9 @@
 RandomTests.test("random floating points in ranges") {
   floatingPointRangeTest(Float.self)
   floatingPointRangeTest(Double.self)
+#if !os(Windows) && (arch(i386) || arch(x86_64))
   floatingPointRangeTest(Float80.self)
+#endif
 }
 
 // Random Elements from collection