moving the hack for linux into a protected area for linux only

Author: lukeis

cpp/webdriver-firefox/build_environment.h

@@ -3,6 +3,11 @@
 
 #ifdef __GNUC__
 #define BUILD_ON_UNIX
+// TODO(lukeis) add guard for gecko 27
+// I tried a few things and couldn't find an option, mozilla-config.h defines MOZILLA_VERSION
+// this file doesn't exist in gecko-17, so if we for whatever reason need to rebuild that version
+// this line will need to be removed
+#include "mozilla/Char16.h"
 #else
 #define BUILD_ON_WINDOWS
 #endif
@@ -18,8 +23,3 @@
 
 #endif
 
-// TODO(lukeis) add guard for gecko 27
-// I tried a few things and couldn't find an option, mozilla-config.h defines MOZILLA_VERSION
-// this file doesn't exist in gecko-17, so if we for whatever reason need to rebuild that version
-// this line will need to be removed
-#include "mozilla/Char16.h"