Stop using build/target -> build/make/target symlink

Instead, fully specify build/make/target/... everywhere

Test: treehugger
Change-Id: Idf89b2e6a0b777adbfb6370ea34f35faee6d4965
diff --git a/target/board/generic_arm64_ab/BoardConfig.mk b/target/board/generic_arm64_ab/BoardConfig.mk
index 6e54d81..28140ce 100644
--- a/target/board/generic_arm64_ab/BoardConfig.mk
+++ b/target/board/generic_arm64_ab/BoardConfig.mk
@@ -36,4 +36,4 @@
 
 # TODO(b/36764215): remove this setting when the generic system image
 # no longer has QCOM-specific directories under /.
-BOARD_SEPOLICY_DIRS += build/target/board/generic_arm64_ab/sepolicy
+BOARD_SEPOLICY_DIRS += build/make/target/board/generic_arm64_ab/sepolicy