Import library target from cmake project.

Added library flag to CMakeBuildTarget struct which is set when parsing
the cbp file. This flag is then used to make sure no runconfiguration
is created for library targets.

Merge-request: 136
Reviewed-by: dt <qtc-committer@nokia.com>

src/plugins/cmakeprojectmanager/cmakeproject.h

@@ -57,7 +57,8 @@ class CMakeBuildSettingsWidget;
 struct CMakeBuildTarget
 {
     QString title;
-    QString executable;
+    QString executable; // TODO: rename to output?
+    bool library;
     QString workingDirectory;
     QString makeCommand;
     QString makeCleanCommand;