[olympic] Add support for an AppLib app specific version

src/olympic/applib/applib.cpp

@@ -13,6 +13,10 @@
 #define OLYMPIC_APP_NAME "App"
 #endif
 
+#ifndef OLYMPIC_APP_VERSION
+#define OLYMPIC_APP_VERSION "dev build"
+#endif
+
 #ifndef OLYMPIC_PROJECT_NAMESPACE
 #define OLYMPIC_PROJECT_NAMESPACE project
 #endif
@@ -31,6 +35,8 @@
 
 namespace olympic {
 
+ox::String s_version = ox::String(OLYMPIC_APP_VERSION);
+
 ox::Error run(
 		ox::StringView project,
 		ox::StringView appName,