[WASM] Fix test/stdlib/Mirror.swift

Author: kateinoigakukun

test/stdlib/Runtime.swift.gyb

@@ -706,7 +706,7 @@ Reflection.test("multiprotocolTypes") {
 var BitTwiddlingTestSuite = TestSuite("BitTwiddling")
 
 BitTwiddlingTestSuite.test("_pointerSize") {
-#if arch(i386) || arch(arm)
+#if arch(i386) || arch(arm) || arch(wasm32)
   expectEqual(4, MemoryLayout<Optional<AnyObject>>.size)
 #elseif arch(x86_64) || arch(arm64) || arch(powerpc64) || arch(powerpc64le) || arch(s390x)
   expectEqual(8, MemoryLayout<Optional<AnyObject>>.size)
@@ -730,7 +730,7 @@ BitTwiddlingTestSuite.test("_isPowerOf2/Int") {
   expectTrue(_isPowerOf2(asInt(2)))
   expectFalse(_isPowerOf2(asInt(3)))
   expectTrue(_isPowerOf2(asInt(1024)))
-#if arch(i386) || arch(arm)
+#if arch(i386) || arch(arm) || arch(wasm32)
   // Not applicable to 32-bit architectures.
 #elseif arch(x86_64) || arch(arm64) || arch(powerpc64) || arch(powerpc64le) || arch(s390x)
   expectTrue(_isPowerOf2(asInt(0x8000_0000)))