Make the pcp2.x RPM provide pcp-devel and pcp-libs
Make the pcp2.x RPM provide pcp-devel and pcp-libs

This RPM packaging change makes it easier for dependent
packages such as pcp-gui to transition to pcp-3.x, where
we have split packaging: pcp, pcp-devel and pcp-libs.

andyvand/cygpcpfans,prasincs/pcp,adfernandes/pcp,tjanez/pcp,edwardt/pcp,aeg-aeg/pcpfans,aeg-aeg/pcpfans,andyvand/cygpcpfans,aeg-aeg/pcpfans,andyvand/cygpcpfans,adfernandes/pcp,tjanez/pcp,wuliming/pcp,aeg-aeg/pcpfans,adfernandes/pcp,wuliming/pcp,tjanez/pcp,wuliming/pcp,wuliming/pcp,mbaldessari/pcp,ryandoyle/pcp_original,edwardt/pcp,prasincs/pcp,prasincs/pcp,andyvand/cygpcpfans,tjanez/pcp,mbaldessari/pcp,wuliming/pcp,ryandoyle/pcp_original,prasincs/pcp,edwardt/pcp,andyvand/cygpcpfans,prasincs/pcp,prasincs/pcp,edwardt/pcp,aeg-aeg/pcpfans,adfernandes/pcp,edwardt/pcp,edwardt/pcp,wuliming/pcp,ryandoyle/pcp_original,adfernandes/pcp,adfernandes/pcp,tjanez/pcp,tjanez/pcp,adfernandes/pcp,andyvand/cygpcpfans,edwardt/pcp,mbaldessari/pcp,aeg-aeg/pcpfans,tjanez/pcp,aeg-aeg/pcpfans,aeg-aeg/pcpfans,wuliming/pcp,mbaldessari/pcp,mbaldessari/pcp,ryandoyle/pcp_original,adfernandes/pcp,mbaldessari/pcp,ryandoyle/pcp_original,edwardt/pcp,prasincs/pcp,ryandoyle/pcp_original,ryandoyle/pcp_original,prasincs/pcp,ryandoyle/pcp_original,tjanez/pcp,andyvand/cygpcpfans,wuliming/pcp,andyvand/cygpcpfans