Merge pull request #4493 from MattKotsenas/patch-1

Exclude Directory.Build.rsp from VisualStudio.gitignore template

VisualStudio.gitignore

@@ -82,6 +82,8 @@ StyleCopReport.xml
 *.pgc
 *.pgd
 *.rsp
+# but not Directory.Build.rsp, as it configures directory-level build defaults
+!Directory.Build.rsp
 *.sbr
 *.tlb
 *.tli