Cppcheck: Add cppcheck static analysis tool

Automatically checks currently opened documents and displays results via text marks/annotations.

CppcheckTrigger detects when to check files or clear results.
CppcheckTextMarkManager stores/clears text marks with checks' results.
CppcheckTool generates run arguments and parses output.
CppcheckRunner runs cppcheck binary.
CppcheckOptions configures CppcheckTool.

Task-number: QTCREATORBUG-20418
Change-Id: I8eafeac7af6137d2c9061ae75d4a56c85b3b5a2d
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

src/plugins/cppcheck/cppcheck.qbs

@@ -0,0 +1,33 @@
+import qbs
+
+QtcPlugin {
+    name: "Cppcheck"
+
+    Depends { name: "Core" }
+    Depends { name: "CppTools" }
+    Depends { name: "ExtensionSystem" }
+    Depends { name: "ProjectExplorer" }
+    Depends { name: "TextEditor" }
+    Depends { name: "Utils" }
+
+    Depends { name: "Qt.widgets" }
+
+    files: [
+        "cppcheckconstants.h",
+        "cppcheckdiagnostic.h",
+        "cppcheckoptions.cpp",
+        "cppcheckoptions.h",
+        "cppcheckplugin.cpp",
+        "cppcheckplugin.h",
+        "cppcheckrunner.cpp",
+        "cppcheckrunner.h",
+        "cppchecktextmark.cpp",
+        "cppchecktextmark.h",
+        "cppchecktextmarkmanager.cpp",
+        "cppchecktextmarkmanager.h",
+        "cppchecktool.cpp",
+        "cppchecktool.h",
+        "cppchecktrigger.cpp",
+        "cppchecktrigger.h"
+    ]
+}