Change the Makfile.am relocatable output files from automake _LIBRARIES
to automake _PROGRAMS. Also, change the output file name extension
from .o to .ro to better show these are relocatable files.
Fixes automake warnings like these:
discover/Makefile.am: `libparser.o' is not a standard library name
discover/Makefile.am: did you mean `libparser.a'?
Signed-off-by: Geoff Levand <geoff@infradead.org>