Rearrange stdlib unit tests across packages.

Rearrange JS stdlib unit tests.

libraries/stdlib/test/numbers/BitwiseOperationsTest.kt

@@ -0,0 +1,35 @@
+package test.numbers
+
+import kotlin.test.*
+import org.junit.Test as test
+
+// TODO: Run these tests during compiler test only (JVM & JS)
+class BitwiseOperationsTest {
+    @test fun orForInt() {
+        assertEquals(3, 2 or 1)
+    }
+
+    @test fun andForInt() {
+        assertEquals(0, 1 and 0)
+    }
+
+    @test fun xorForInt() {
+        assertEquals(1, 2 xor 3)
+    }
+
+    @test fun shlForInt() {
+        assertEquals(4, 1 shl 2)
+    }
+
+    @test fun shrForInt() {
+        assertEquals(1, 2 shr 1)
+    }
+
+    @test fun ushrForInt() {
+        assertEquals(2147483647, -1 ushr 1)
+    }
+
+    @test fun invForInt() {
+        assertEquals(0, (-1).inv())
+    }
+}