Fix source build issue

Author: layomia

eng/SourceBuildPrebuiltBaseline.xml

@@ -10,6 +10,7 @@
     <UsagePattern IdentityGlob="System.Composition*/*7.*" />
     <UsagePattern IdentityGlob="Microsoft.CodeAnalysis*/*4.4.*" />
     <UsagePattern IdentityGlob="Microsoft.CodeAnalysis*/*4.5.*" />
+    <UsagePattern IdentityGlob="Microsoft.CodeAnalysis*/*4.7.*" />
 
     <!-- Allowed and pinned to major version due to https://github.com/dotnet/source-build/issues/3228 -->
     <UsagePattern IdentityGlob="Microsoft.NETCore.App.Crossgen2.linux-x64/*8.*" />