Merge "Allow sourcing envsetup from anywhere" am: 0e46244250 am: 596a630c65

Original change: https://android-review.googlesource.com/c/platform/build/+/2097636

Change-Id: I1470f163980b57d0c56f9dcb00f3692b3f8c8cc7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

envsetup.sh

@@ -403,7 +403,9 @@ function addcompletions()
     # e.g.
     # ENVSETUP_NO_COMPLETION=adb # -> disable adb completion
     # ENVSETUP_NO_COMPLETION=adb:bit # -> disable adb and bit completion
+    local T=$(gettop)
     for f in ${completion_files[*]}; do
+        f="$T/$f"
         if [ ! -f "$f" ]; then
           echo "Warning: completion file $f not found"
         elif should_add_completion "$f"; then