added a note about making android_exe
added a note about making android_exe

Change-Id: I7ec755dc9a8a4c80b3ebcab69535898a39c77648

cambridgehackers/connectal,hanw/connectal,cambridgehackers/connectal,8l/connectal,hanw/connectal,8l/connectal,hanw/connectal,cambridgehackers/connectal,cambridgehackers/connectal,8l/connectal,csail-csg/connectal,hanw/connectal,csail-csg/connectal,csail-csg/connectal,cambridgehackers/connectal,hanw/connectal,chenm001/connectal,8l/connectal,chenm001/connectal,chenm001/connectal,csail-csg/connectal,csail-csg/connectal,chenm001/connectal,chenm001/connectal,8l/connectal