Renamed Boost Build's internal testing assert.result-equal rule to assert.result-set-equal to make it clear that results are compared as sets - ignoring duplicates and ordering.

[SVN r46260]

tools/build

@@ -1 +1 @@
-Subproject commit 7722c0b981415ff05fddcb2d175eb1557b5ffd0e
+Subproject commit 3536ca0702e75e64e1660c5bafbd4744af1c2af3