Change: Include the full raw git revision hash in rev.cpp

src/rev.cpp.in

@@ -47,6 +47,11 @@ const char _openttd_revision[] = "!!VERSION!!";
  */
 const char _openttd_build_date[] = __DATE__ " " __TIME__;
 
+/**
+ * The git revision hash of this version.
+ */
+const char _openttd_revision_hash[] = "!!GITHASH!!";
+
 /**
  * Let us know if current build was modified. This detection
  * works even in the case when revision string is overridden by