Merge pull request #6008 from yandex/gcd-lcm-std

Using std::gcd, lcm instead of boost

dbms/src/Functions/gcd.cpp

 #include <Functions/FunctionFactory.h>
 #include <Functions/FunctionBinaryArithmetic.h>
-#include <boost/integer/common_factor.hpp>
+#include <numeric>
+
 
 namespace DB
 {
@@ -15,7 +16,7 @@ struct GCDImpl
     {
         throwIfDivisionLeadsToFPE(typename NumberTraits::ToInteger<A>::Type(a), typename NumberTraits::ToInteger<B>::Type(b));
         throwIfDivisionLeadsToFPE(typename NumberTraits::ToInteger<B>::Type(b), typename NumberTraits::ToInteger<A>::Type(a));
-        return boost::integer::gcd(
+        return std::gcd(
             typename NumberTraits::ToInteger<Result>::Type(a),
             typename NumberTraits::ToInteger<Result>::Type(b));
     }

dbms/src/Functions/lcm.cpp

 #include <Functions/FunctionFactory.h>
 #include <Functions/FunctionBinaryArithmetic.h>
-#include <boost/integer/common_factor.hpp>
+#include <numeric>
+
 
 namespace DB
 {
@@ -15,7 +16,7 @@ struct LCMImpl
     {
         throwIfDivisionLeadsToFPE(typename NumberTraits::ToInteger<A>::Type(a), typename NumberTraits::ToInteger<B>::Type(b));
         throwIfDivisionLeadsToFPE(typename NumberTraits::ToInteger<B>::Type(b), typename NumberTraits::ToInteger<A>::Type(a));
-        return boost::integer::lcm(
+        return std::lcm(
             typename NumberTraits::ToInteger<Result>::Type(a),
             typename NumberTraits::ToInteger<Result>::Type(b));
     }