fw-api: CL 5111624 - update fw common interface files

HTT stats: correct the placement of num_bins field
Move num_bins field from after variable-length array to before.This introduces a backwards-incompatibility in the two affected TLVs, but this backwards-incompatibility is an acceptable cost for fixing the TLV printout.Also, add/remove \n from HTT stats printouts, to end up with just one \n per TLV printout

Change-Id: I5d57ea1d7f60d69b354df517ff4a771bee79e321
CRs-Fixed: 2262693