Organizing array tests into more directories.

test/libsolidity/semanticTests/array/pop/array_pop_array_transition.sol

@@ -0,0 +1,26 @@
+contract c {
+    uint256 a;
+    uint256 b;
+    uint256 c;
+    uint16[] inner = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
+    uint16[][] data;
+    function test() public returns (uint x, uint y, uint z) {
+        for (uint i = 1; i <= 48; i++)
+            data.push(inner);
+        for (uint j = 1; j <= 10; j++)
+            data.pop();
+        x = data[data.length - 1][0];
+        for (uint k = 1; k <= 10; k++)
+            data.pop();
+        y = data[data.length - 1][1];
+        for (uint l = 1; l <= 10; l++)
+            data.pop();
+        z = data[data.length - 1][2];
+        for (uint m = 1; m <= 18; m++)
+            data.pop();
+        delete inner;
+    }
+}
+// ----
+// test() -> 1, 2, 3
+// storage: empty