- strip -Werror to fix sparc64 build

Index: tools/cpp/CMakeLists.txt
--- tools/cpp/CMakeLists.txt.orig
+++ tools/cpp/CMakeLists.txt
@@ -25,7 +25,7 @@ set (
 )
 
 if (NOT WIN32)
-  add_definitions ("-Wall -Werror")
+  add_definitions ("-Wall")
 endif ()
 
 include_directories ("src")
