Thrift-2467: Unable to build contrib/fb303 on OSX 10.9.2
Client: build
Patch: jfarrell

Updates fb303 build to use ax_cxx macros to detect and add std cflags.
diff --git a/contrib/fb303/configure.ac b/contrib/fb303/configure.ac
index 5b99f2a..73b35ba 100644
--- a/contrib/fb303/configure.ac
+++ b/contrib/fb303/configure.ac
@@ -71,6 +71,7 @@
 # Example: sets $(thrift_home) variable with default path set to /usr/local.
 FB_WITH_PATH([thrift_home], [thriftpath], [/usr/local])
 
+AX_CXX_COMPILE_STDCXX_11([noext])
 AX_THRIFT_LIB(cpp, [C++], yes)
 have_cpp=no
 if test "$with_cpp" = "yes"; then