Handle property sets attached to toolset-version specifiers in

toolset= and --toolset= autoconfiguration.


[SVN r36411]

tools/build

@@ -1 +1 @@
-Subproject commit 792a8e8df028623550a02e128a92973d327167da
+Subproject commit 86d1c2b2235b11a6a1fbac6835891b01b03bedb0