Make run() static

clang correctly notes that this should be static, as it's not used
outside the compile unit.

Tested: code compiles with clang.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I7c540fe74b9fce1f3e498fb75089a143c7af4581
diff --git a/src/webserver_main.cpp b/src/webserver_main.cpp
index b05161d..6bdce98 100644
--- a/src/webserver_main.cpp
+++ b/src/webserver_main.cpp
@@ -61,7 +61,7 @@
     }
 }
 
-int run()
+static int run()
 {
     crow::Logger::setLogLevel(crow::LogLevel::Debug);