Add atrace to core.mk
Add atrace to core.mk

This change adds the atrace binary and init.trace.rc to the system image for
all builds.

Bug: 6513400
Change-Id: Ib979f4b6ffe799ab56e66fc3acfad754d216c576

see4ri/lolili,hagar006/platform_manifest,xorware/android_build,Hybrid-Power/startsync,knone1/platform_manifest,xorware/android_build,xorware/android_build,pranav01/platform_manifest,xorware/android_build,ND-3500/platform_manifest,xorware/android_build,fallouttester/platform_manifest,RR-msm7x30/platform_manifest