BD RefChange: add short note about changes #668

Job	Run time
build-drivers-release	9m 43s
build-postlib-release	14m 34s
build-all-debug	7m 36s
build-all-debug-single	4m 11s
build-test-uadriver-debug	3m 7s
rtest-modules-debug	8m 1s
rtest-module-drivers	3m 34s
build-openfast-release	5m 5s
build-interfaces-release	7m 35s
build-fastfarm-release	17m 25s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	1m 16s
rtest-OF	8m 25s
rtest-OF-5MW_Land_BD_DLL_WTurb	3m 1s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	4m 13s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	1m 57s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	8m 19s
rtest-OF-linearization	2m 48s
rtest-interfaces	9m 10s
rtest-FF	2m 10s
	2h 2m 10s

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