build: Enable system_ext logical partition

Change-Id: I5bf8c3344b0b442bb2b9281f32ebc47db365253f
diff --git a/build/build.sh b/build/build.sh
index 4e17a97..68c2e62 100755
--- a/build/build.sh
+++ b/build/build.sh
@@ -170,7 +170,7 @@
 QSSI_ARGS="$ARGS ENABLE_AB=$ENABLE_AB"
 
 #This flag control system_ext logical partition enablement
-SYSTEMEXT_SEPARATE_PARTITION_ENABLE=false
+SYSTEMEXT_SEPARATE_PARTITION_ENABLE=true
 QSSI_ARGS="$QSSI_ARGS SYSTEMEXT_SEPARATE_PARTITION_ENABLE=$SYSTEMEXT_SEPARATE_PARTITION_ENABLE"
 
 # OTA/Dist related variables