Correct disabling of c++11 testing

C++11 testing was not being turned off when the
C++ compiler check for C++11 features failed and
'configure --enable-cpp11-testing' was used

Examples/test-suite/common.mk

@@ -677,7 +677,7 @@ ifndef SKIP_CPP_STD_CASES
 CPP_TEST_CASES += ${CPP_STD_TEST_CASES}
 endif
 
-ifneq (,$(HAVE_CXX11))
+ifeq (1,$(HAVE_CXX11))
 CPP_TEST_CASES += $(CPP11_TEST_CASES)
 endif
 

configure.ac

@@ -345,6 +345,7 @@ if test x"$enable_cpp11_testing" = xyes; then
   CXX=$CXX_SAVED
   CXXCPP=$CXXCPP_SAVED
 fi
+AC_SUBST(HAVE_CXX11)
 
 # On darwin 10.7,10.8,10.9 using clang++, need to ensure using
 # libc++ for tests and examples to run under mono. May affect
@@ -401,7 +402,6 @@ AC_SUBST(TRYLINKINGWITHCXX)
 AC_SUBST(RPATH)
 AC_SUBST(PLATCFLAGS)
 AC_SUBST(PLATCXXFLAGS)
-AC_SUBST(HAVE_CXX11)
 AC_SUBST(LINKFORSHARED)
 
 # This variation is needed on OS-X because there is no (apparent) consistency in shared library naming.