qmakeprojectimporter: avoid adding duplicate entries

ios having multiple makefiles gets detected several times and one
ends up with 5 times the same entry when conviguring a project
that was already present

Change-Id: I5685208305d1f489c5502d5aec0c08dded49da90
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/qmakeprojectmanager/qmakebuildinfo.h

@@ -48,6 +48,17 @@ public:
     QString additionalArguments;
     QString makefile;
 
+    bool operator==(const QmakeBuildInfo &o) {
+        return displayName == o.displayName
+                && typeName == o.typeName
+                && buildDirectory == o.buildDirectory
+                && kitId == o.kitId
+                && typeName == o.typeName
+                && supportsShadowBuild == o.supportsShadowBuild
+                && type == o.type
+                && additionalArguments == o.additionalArguments;
+    }
+
     QList<ProjectExplorer::Task> reportIssues(const QString &projectPath,
                                               const QString &buildDir) const
     {

src/plugins/qmakeprojectmanager/qmakeprojectimporter.cpp

@@ -163,7 +163,17 @@ QList<ProjectExplorer::BuildInfo *> QmakeProjectImporter::import(const Utils::Fi
             info->additionalArguments = additionalArguments;
             info->makefile = makefile;
 
-            result << info;
+            bool found = false;
+            foreach (ProjectExplorer::BuildInfo *bInfo, result) {
+                if (*static_cast<QmakeBuildInfo *>(bInfo) == *info) {
+                    found = true;
+                    break;
+                }
+            }
+            if (found)
+                delete info;
+            else
+                result << info;
         }
     }