add Adaptor template parameter, to convert output from underlying generator

to input of distribution


[SVN r16104]

libs/random

@@ -1 +1 @@
-Subproject commit 69a4afbcab0bf54739ccbad7bace5f0198a573b4
+Subproject commit c524749d743f44558869900ec3aed3357c0f2db9