Remove OPROFILE_EVENTS_DIR, add ANDROID_HOST_OUT.

Change-Id: I81b82fa2b7c754a2901dff124a36fe3b7b5abfd0
diff --git a/envsetup.sh b/envsetup.sh
index 4e40175..1443760 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -126,12 +126,12 @@
     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
-
-    # needed for OProfile to post-process collected samples
-    export OPROFILE_EVENTS_DIR=$prebuiltdir/oprofile
 }
 
 function printconfig()