msm8974: disable logs in user builds
msm8974: disable logs in user builds

Added checks on target build variant to suppress
LK logs in user variant builds.

CRs-Fixed: 697570
Change-Id: I7b7fd66f7ab46f93493998cd11e881aa7acf7b88

mozilla-b2g/fairphone2_kernel_lk,lg-devs/g2-bootloader,mozilla-b2g/fairphone2_kernel_lk,t2m-foxfone/android_kernel_lk,lg-devs/g2-bootloader,mozilla-b2g/fairphone2_kernel_lk,mozilla-b2g/fairphone2_kernel_lk,mozilla-b2g/fairphone2_kernel_lk,t2m-foxfone/android_kernel_lk,lg-devs/g2-bootloader,lg-devs/g2-bootloader,t2m-foxfone/android_kernel_lk,t2m-foxfone/android_kernel_lk,lg-devs/g2-bootloader,t2m-foxfone/android_kernel_lk