apq8064: disable logs in user builds

Disable LK logging in user variant builds.

Change-Id: I7ce9111e1e1836715050ed7957ebbc067cf39f4c
diff --git a/project/apq8064.mk b/project/apq8064.mk
index 1c483dd..7a105a1 100644
--- a/project/apq8064.mk
+++ b/project/apq8064.mk
@@ -6,7 +6,11 @@
 
 MODULES += app/aboot
 
+ifeq ($(TARGET_BUILD_VARIANT),user)
+DEBUG := 0
+else
 DEBUG := 1
+endif
 
 #DEFINES += WITH_DEBUG_DCC=1
 DEFINES += WITH_DEBUG_UART=1