sm6520-common: use BUILD_COPY_HEADERS

Bug: 130719878
Test: turn copy headers into an error by default; still builds
Change-Id: Idf228b2e8c4a4d93c3ad43fcd9995564d4feb67d

BoardConfigCommon.mk

@@ -37,6 +37,9 @@ BOARD_BLUETOOTH_BDROID_BUILDCFG_INCLUDE_DIR := $(COMMON_PATH)/bluetooth/include
 # Bootloader
 TARGET_NO_BOOTLOADER := true
 
+# Build broken
+BUILD_BROKEN_USES_BUILD_COPY_HEADERS := true
+
 # Camera
 TARGET_USES_QTI_CAMERA_DEVICE := true