fix setting custom b2 feature from CLI

boost-stacktrace-features.jam

@@ -0,0 +1,9 @@
+#  Copyright (C) 2016-2024, Antony Polukhin.
+#
+# Use, modification and distribution is subject to the Boost Software License,
+# Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+#
+import feature ;
+
+feature.feature boost.stacktrace.from_exception : on off : optional propagated ;

build.jam

@@ -5,6 +5,8 @@
 
 require-b2 5.2 ;
 
+import boost-stacktrace-features ;
+
 constant boost_dependencies :
     <library>/boost/config//boost_config
     <library>/boost/container_hash//boost_container_hash

build/Jamfile.v2

@@ -7,8 +7,8 @@
 
 require-b2 5.0.1 ;
 import-search /boost/config/checks ;
+import boost-stacktrace-features ;
 import config : requires ;
-import feature ;
 import property ;
 
 constant boost_dependencies_private :
@@ -29,8 +29,6 @@ lib gcc_s ;
 lib Dbgeng ;
 lib ole32 ;
 
-feature.feature boost.stacktrace.from_exception : on off : optional propagated ;
-
 local LIBBACKTRACE_PATH = [ modules.peek : LIBBACKTRACE_PATH ] ;
 lib backtrace
   :