LU-5541 build: build static and dynamic liblustreapi

LU-5541 build: build static and dynamic liblustreapi

libtool knows how to build both, so no need to hack the Makefile. As
two added benefits, the utilities will now use the dynamic version,
thus reducing their footprint, and calling make twice in a row won't
rebuild objects already built.

Test-Parameters: trivial

Change-Id: If4191e1ff1564793c476ffe03f5d4b6ad5295421
Signed-off-by: frank zago <fzago@cray.com>
Reviewed-on: https://review.whamcloud.com/11625
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Henri Doreau <henri.doreau@cea.fr>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>