Add cmdline tests

Author: matheusaaguiar

test/cmdlineTests/storage_base_location_defined_ancestor/in.sol

@@ -0,0 +1,10 @@
+//SPDX-License-Identifier: GPL-3.0
+pragma solidity >=0.0;
+contract A layout at 0x1234 {
+}
+
+contract B is A {
+}
+
+contract C layout at 0x1234 is B {
+}

test/cmdlineTests/storage_base_location_defined_ancestor/input.json

@@ -0,0 +1,11 @@
+{
+	"language": "Solidity",
+	"sources": {
+		"fileA": {"urls": ["storage_base_location_defined_ancestor/in.sol"]}
+	},
+	"settings": {
+		"outputSelection": {
+			"fileA": { "A": ["*"] }
+		}
+	}
+}

test/cmdlineTests/storage_base_location_defined_ancestor/output.json

@@ -0,0 +1,69 @@
+{
+    "errors": [
+        {
+            "component": "general",
+            "errorCode": "8894",
+            "formattedMessage": "TypeError: Storage base location can only be specified in the most derived contract.
+ --> fileA:6:1:
+  |
+6 | contract B is A {
+  | ^ (Relevant source part starts here and spans across multiple lines).
+Note: Storage base location was already specified here.
+ --> fileA:3:22:
+  |
+3 | contract A layout at 0x1234 {
+  |                      ^^^^^^
+
+",
+            "message": "Storage base location can only be specified in the most derived contract.",
+            "secondarySourceLocations": [
+                {
+                    "end": 85,
+                    "file": "fileA",
+                    "message": "Storage base location was already specified here.",
+                    "start": 79
+                }
+            ],
+            "severity": "error",
+            "sourceLocation": {
+                "end": 110,
+                "file": "fileA",
+                "start": 91
+            },
+            "type": "TypeError"
+        },
+        {
+            "component": "general",
+            "errorCode": "8894",
+            "formattedMessage": "TypeError: Storage base location can only be specified in the most derived contract.
+ --> fileA:9:1:
+  |
+9 | contract C layout at 0x1234 is B {
+  | ^ (Relevant source part starts here and spans across multiple lines).
+Note: Storage base location was already specified here.
+ --> fileA:3:22:
+  |
+3 | contract A layout at 0x1234 {
+  |                      ^^^^^^
+
+",
+            "message": "Storage base location can only be specified in the most derived contract.",
+            "secondarySourceLocations": [
+                {
+                    "end": 85,
+                    "file": "fileA",
+                    "message": "Storage base location was already specified here.",
+                    "start": 79
+                }
+            ],
+            "severity": "error",
+            "sourceLocation": {
+                "end": 148,
+                "file": "fileA",
+                "start": 112
+            },
+            "type": "TypeError"
+        }
+    ],
+    "sources": {}
+}