Add host exports for platform libraries used by ART host testing.

Test: build-mainline-modules.sh
Bug: 142935992
Change-Id: I81247b89b78426463faeb6b00212cd8901319b19
diff --git a/scripts/build-mainline-modules.sh b/scripts/build-mainline-modules.sh
index 0520d31..1bc78e6 100755
--- a/scripts/build-mainline-modules.sh
+++ b/scripts/build-mainline-modules.sh
@@ -24,6 +24,7 @@
   i18n-module-test-exports
   i18n-module-sdk
   platform-mainline-sdk
+  platform-mainline-host-exports
 )
 
 # List of libraries installed on the platform that are needed for ART chroot