Modified GUID to fix duplicate GUID problem with Linux Book Sources

Samples/Linux/BookSourceCode/XNAGameDevelopmentbyExampleCode/RobotRampage/MonoGame.Samples.RobotRampage.Linux.csproj

@@ -5,7 +5,7 @@
     <Platform Condition=" '$(Platform)' == '' ">x86</Platform>
     <ProductVersion>9.0.21022</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
-    <ProjectGuid>{86A219E2-C8F0-452B-B762-C69D5BB07C98}</ProjectGuid>
+    <ProjectGuid>{9522776F-02BA-4BED-B8BB-6BAE580F4068}</ProjectGuid>
     <OutputType>Exe</OutputType>
     <RootNamespace>AsteroidBeltAssault</RootNamespace>
     <AssemblyName>FloodControl</AssemblyName>