Eclipse: quote the build dir (to make it work with spaces)

When creating the targets for Eclipse, quote the directory
in which make should change. Otherwise it will fail if the
path contains with spaces.

Alex

Source/cmExtraEclipseCDT4Generator.cxx

@@ -998,9 +998,9 @@ void cmExtraEclipseCDT4Generator::CreateCProjectFile() const
           std::string virtDir = "[Targets]/";
           virtDir += prefix;
           virtDir += ti->first;
-          std::string buildArgs = "-C ";
+          std::string buildArgs = "-C \"";
           buildArgs += makefile->GetHomeOutputDirectory();
-          buildArgs += " ";
+          buildArgs += "\" ";
           buildArgs += makeArgs;
           this->AppendTarget(fout, "Build", make, buildArgs, virtDir, "",
                              ti->first.c_str());