Add generation of rcheevos hash to DolphinTool

Fixed coding standards issue

CalculateHash return string instead of using char array param

Source/Core/DolphinTool/DolphinTool.vcxproj

@@ -41,6 +41,7 @@
   <Import Project="$(ExternalsDir)liblzma\exports.props" />
   <Import Project="$(ExternalsDir)mbedtls\exports.props" />
   <Import Project="$(ExternalsDir)picojson\exports.props" />
+  <Import Project="$(ExternalsDir)rcheevos\exports.props" />
   <Import Project="$(ExternalsDir)zstd\exports.props" />
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">