Tonight's program at the Pop Concert in Symphony Hall is as follows: 1.  March, "Boccacio,"  Suppe 2.  Waltz, "Militaire,"  Ganne 3.  Overture, "Light Cavalry,"  Suppe 4.  Selection, "The Chocolate Soldier,"  Strauss 5.  Selection, "Samson and Delilah,"  Saint-Saens 6.  Cavalry March, "Defile," 7.  Overture, "Fra Diavolo,"  Auber 8.  March Hongrolse,  Berlioz 9.  Jubilee Overture,  Weber 10.  Waltz, "Fideles Wien,"  Komzak 11.  American Fantasy, Organ, Mr. Marshal.  Herbert 12.  March, "Second Connecticut,"  Reeves