eventdev: bump library version

Bumping the library version to reflect the ABI change, where
rte_event_pmd_pci_probe(), rte_event_pmd_pci_remove(),
rte_event_pmd_vdev_init(), rte_event_pmd_vdev_uninit()
functions removed from the library.

Fixes: b1b3d9f90502 ("eventdev: make vdev init and uninit functions optional")
Fixes: 9a8269d56942 ("eventdev: make PCI probe and remove functions optional")

Reported-by: Thomas Monjalon <thomas@monjalon.net>
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>

doc/guides/rel_notes/release_17_08.rst

@@ -379,6 +379,7 @@ The libraries prepended with a plus sign were incremented in this version.
      librte_distributor.so.1
    + librte_eal.so.5
    + librte_ethdev.so.7
+   + librte_eventdev.so.2
    + librte_gro.so.1
      librte_hash.so.2
      librte_ip_frag.so.1

lib/librte_eventdev/Makefile

@@ -34,7 +34,7 @@ include $(RTE_SDK)/mk/rte.vars.mk
 LIB = librte_eventdev.a
 
 # library version
-LIBABIVER := 1
+LIBABIVER := 2
 
 # build flags
 CFLAGS += -O3