Variable buffer api additions
Variable buffer api additions

    -Added flipBit() and getNumBitsSet() support to
     fapi2::variable_buffer

Change-Id: Ifb0be59520dc6cfa26a060e7981ff27f1e0b4b68
RTC:126566
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/27943
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Tested-by: PPE CI <dc75934ba5befb9221434e67a247b93aec46b36b@us.ibm.com>
Tested-by: Hostboot CI <52521565bd8ea18a2b112942dce4f4220a97c2c8@us.ibm.com>
Reviewed-by: LUCAS W. MULKEY <bf13fcb158646f7a6fbaf918ff8360f5c64b83ab@us.ibm.com>
Reviewed-by: Brian R. Silver <af0eed78d989d9597decc8b92fa6db01ef8b58e0@us.ibm.com>
Reviewed-by: Matt K. Light <19ba8ed73a0b3c376c81fced381f1ac0f483b7c2@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <ab93eca12e43608f33daa16a67357cd7b7e867ab@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/27951
Tested-by: FSP CI Jenkins <aa9e4d9ac7cd25905e9c0dd36d4150516e73dd86@us.ibm.com>
Reviewed-by: Daniel M. Crowell <912029ca9254ac7b5854e56910561d682e1fa2d0@us.ibm.com>

Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot