Update math from master.

boost-commitbot · boost-commitbot · commit 3913b6bb7f7a · 2014-10-30T08:00:14.000-04:00
diff --git a/libs/math b/libs/math
@@ -1 +1 @@
-Subproject commit 15ab15494c46a1649735f53bd743436f3dd9e2ef
+Subproject commit 3c4d1804e1556ccebb54fe6e823a66020526e6ae
