Qbs: Fix linking tests when building release with tests

Change-Id: I5df34f06b5ca107b5e85cf6319d6d08aba244e5b
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/libs/tracing/tracing.qbs

@@ -9,6 +9,7 @@ Project {
 
     QtcLibrary {
         Depends { name: "Qt"; submodules: ["qml", "quick", "gui"] }
+        Depends { name: "Qt.testlib"; condition: project.withAutotests }
         Depends { name: "Utils" }
 
         Group {
@@ -48,7 +49,7 @@ Project {
 
         Group {
             name: "Unit test utilities"
-            condition: qtc.testsEnabled
+            condition: project.withAutotests
             files: [
                 "runscenegraphtest.cpp", "runscenegraphtest.h"
             ]

src/plugins/cpptools/cpptools.qbs

@@ -8,6 +8,7 @@ Project {
 
     QtcPlugin {
         Depends { name: "Qt.widgets" }
+        Depends { name: "Qt.testlib"; condition: project.withAutotests }
         Depends { name: "CPlusPlus" }
         Depends { name: "Utils" }
 
@@ -216,6 +217,15 @@ Project {
             "usages.h",
         ]
 
+        Group {
+            name: "TestCase"
+            condition: qtc.testsEnabled || project.withAutotests
+            files: [
+                "cpptoolstestcase.cpp",
+                "cpptoolstestcase.h",
+            ]
+        }
+
         Group {
             name: "Tests"
             condition: qtc.testsEnabled
@@ -230,8 +240,6 @@ Project {
                 "cppsourceprocessertesthelper.cpp",
                 "cppsourceprocessertesthelper.h",
                 "cppsourceprocessor_test.cpp",
-                "cpptoolstestcase.cpp",
-                "cpptoolstestcase.h",
                 "modelmanagertesthelper.cpp",
                 "modelmanagertesthelper.h",
                 "symbolsearcher_test.cpp",