Enable the generate transaction name for system server.

Size of vdex,art,oat files (flag off -> on)
- framework/boot*.vdex: +10K  (3.589M -> 3.599M)
- framework/arm64/boot*.{art,oat}: +20K  (4.378M -> 4.398M)

Test: manual
Change-Id: I4938ca5459004494a50ec81db9ef9e0f0e6e7a60