sds-keyval.pc.in replaced by client and server versions

maint/sds-keyval.pc.in

-prefix=@prefix@
-exec_prefix=@exec_prefix@
-libdir=@libdir@
-includedir=@includedir@
-
-Name: sds-keyval
-Description: simple margo-projected keyval service
-Version: 0.1
-URL: http://www.mcs.anl.gov/sds/sds-keyval
-Requires: margo ssg ch-placement leveldb berkeley-db
-Libs: -L${libdir} -lkvclient -lkvserver -lkvgroupclient -lkvgroupserver
-Libs.private: @LDFLAGS@ @LIBS@
-Cflags: -I${includedir} @CPPFLAGS@