Use subdir-objects with AM_INIT_AUTOMAKE to prevent a bunch of warning messages encountered with automake 1.14. 
Use subdir-objects with AM_INIT_AUTOMAKE to prevent a bunch of warning messages encountered with automake 1.14. 

The warning messages were harmless. However, they would turn into errors in upcoming automake 2.0.

This change makes object files be generated in src subdir as opposed to upper level Makefile directory.

Before upgrading to this version, you may want to issue `make distclean` to remove all the generated .deps and other helper files.
AaronZhangL/unimrcp,pgaval/unimrcp,MattRiddell/unimrcp,andrenatal/unimrcp,andrenatal/unimrcp,MattRiddell/unimrcp,MattRiddell/unimrcp,pgaval/unimrcp,pgaval/unimrcp,andrenatal/unimrcp,AaronZhangL/unimrcp,AaronZhangL/unimrcp