Add BOOST_NO_CXX17_HDR_STRING_VIEW.

test/all/Jamfile.v2

@@ -1,7 +1,7 @@
 #
 # Regression test Jamfile for boost configuration setup.
 # *** DO NOT EDIT THIS FILE BY HAND ***
-# This file was automatically generated on Sat Aug  4 19:11:09 2018
+# This file was automatically generated on Thu Aug 16 11:20:17 2018
 #  by libs/config/tools/generate.cpp
 # Copyright John Maddock.
 # Use, modification and distribution are subject to the 
@@ -328,6 +328,9 @@ test-suite "BOOST_NO_CXX17_FOLD_EXPRESSIONS" :
 test-suite "BOOST_NO_CXX17_HDR_OPTIONAL" : 
 [ run ../no_cxx17_hdr_optional_pass.cpp ]
 [ compile-fail ../no_cxx17_hdr_optional_fail.cpp ] ;
+test-suite "BOOST_NO_CXX17_HDR_STRING_VIEW" : 
+[ run ../no_cxx17_hdr_string_view_pass.cpp ]
+[ compile-fail ../no_cxx17_hdr_string_view_fail.cpp ] ;
 test-suite "BOOST_NO_CXX17_IF_CONSTEXPR" : 
 [ run ../no_cxx17_if_constexpr_pass.cpp ]
 [ compile-fail ../no_cxx17_if_constexpr_fail.cpp ] ;