Rename product_services to system_ext

Bug: 134359158
Test: build and check if system_ext.img is created
Change-Id: I67f2e95dd29eac6a28e07e24ea973d3a134c3bfc
diff --git a/target/board/BoardConfigGsiCommon.mk b/target/board/BoardConfigGsiCommon.mk
index 702ef3c..e4dd032 100644
--- a/target/board/BoardConfigGsiCommon.mk
+++ b/target/board/BoardConfigGsiCommon.mk
@@ -19,8 +19,9 @@
 # Enable dynamic system image size and reserved 64MB in it.
 BOARD_SYSTEMIMAGE_PARTITION_RESERVED_SIZE := 67108864
 
-# GSI forces product packages to /system for now.
+# GSI forces product and system_ext packages to /system for now.
 TARGET_COPY_OUT_PRODUCT := system/product
+TARGET_COPY_OUT_SYSTEM_EXT := system/system_ext
 BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE :=
 
 # Creates metadata partition mount point under root for
diff --git a/target/board/BoardConfigMainlineCommon.mk b/target/board/BoardConfigMainlineCommon.mk
index 9bc7e0c..70cfe39 100644
--- a/target/board/BoardConfigMainlineCommon.mk
+++ b/target/board/BoardConfigMainlineCommon.mk
@@ -8,7 +8,8 @@
 
 TARGET_USERIMAGES_USE_EXT4 := true
 
-# Mainline devices must have /vendor and /product partitions.
+# Mainline devices must have /system_ext, /vendor and /product partitions.
+TARGET_COPY_OUT_SYSTEM_EXT := system_ext
 TARGET_COPY_OUT_VENDOR := vendor
 TARGET_COPY_OUT_PRODUCT := product