File 3ecbf83f.patch of Package boost

commit 3ecbf83ff33750ceffda199de97283d200357633
Author: Andrey Semashev <andrey.semashev@gmail.com>
Date:   Sat Apr 13 21:54:45 2019 +0300

    Added MPI Python libs to install target.
    
    This fixes mpi plugins for Python not being built and installed.

Index: boost_1_71_0/libs/mpi/build/Jamfile.v2
===================================================================
--- boost_1_71_0.orig/libs/mpi/build/Jamfile.v2
+++ boost_1_71_0/libs/mpi/build/Jamfile.v2
@@ -74,6 +74,7 @@ rule python-tag ( name : type ? : proper
     return  [ tag $(result) : $(type) : $(property-set) ] ;
 }
 
+mpi_python_libs = ;
 
 if [ mpi.configured ]
 {
@@ -169,6 +170,8 @@ lib boost_mpi
                 <link>shared <runtime-link>shared
                 <python-debugging>on:<define>BOOST_DEBUG_PYTHON
               ;
+
+            mpi_python_libs = boost_mpi_python mpi ;
   }
 }
 else if ! ( --without-mpi in  [ modules.peek : ARGV ] )
@@ -185,4 +188,4 @@ else
   alias boost_mpi ;
 }
 
-boost-install boost_mpi ;
+boost-install boost_mpi $(mpi_python_libs) ;