add ANDROID_HOST_OUT to env (please do not merge)

Change-Id: I97e49fcb2610344df1907ec17116ee6e8a586e38
diff --git a/envsetup.sh b/envsetup.sh
index 2faeed1..24c4386 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -126,6 +126,9 @@
     export ANDROID_PRODUCT_OUT=$(get_abs_build_var PRODUCT_OUT)
     export OUT=$ANDROID_PRODUCT_OUT
 
+    unset ANDROID_HOST_OUT
+    export ANDROID_HOST_OUT=$(get_abs_build_var HOST_OUT)
+
     # needed for building linux on MacOS
     # TODO: fix the path
     #export HOST_EXTRACFLAGS="-I "$T/system/kernel_headers/host_include