Support secondary arch for host module exports.

Bug: 142935992
Test: build-aml-prebuilts.sh generate x86 prebuilts

Merged-In: Iec4d8aa59a3ad55583c788f8ec40dd0637e7af33
Change-Id: Iec4d8aa59a3ad55583c788f8ec40dd0637e7af33
(cherry picked from commit abdc8c55014770a441d41363cd715ed048c49f96)
diff --git a/scripts/build-aml-prebuilts.sh b/scripts/build-aml-prebuilts.sh
index 7e3a82c..35a6ff3 100755
--- a/scripts/build-aml-prebuilts.sh
+++ b/scripts/build-aml-prebuilts.sh
@@ -58,6 +58,7 @@
 
     "DeviceName": "generic_arm64",
     "HostArch": "x86_64",
+    "HostSecondaryArch": "x86",
     "Aml_abis": true,
 
     "UseGoma": ${USE_GOMA}