vs project: change to "old style" PDB for release build

- https://bugs.eclipse.org/bugs/show_bug.cgi?id=518765#c2


  describes a bug that seems to occur during concurrent Jenkins
  builds when /Zi (complete debug information) flag is enabled.
  This patch changes the flag to "C7 Compatible (/Z7)" in an
  attempt to prevent these failed concurrent builds.

Change-Id: I0a777c66651463488352d3e3797b89d5ed1b1791
Reviewed-by: Philippe Gorley <philippe.gorley@savoirfairelinux.com>

MSVC/ring-daemon.vcxproj

@@ -471,6 +471,7 @@
       </BasicRuntimeChecks>
       <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <DebugInformationFormat>OldStyle</DebugInformationFormat>
     </ClCompile>
     <Link>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>