Add logging for zipapex failure.

linux-bionic-x64-zipapex is failing and it's not clear why. Add
additional logging to try to find the answer.

Test: None
Change-Id: Iec7de17cd9c7c7816fb6b0ff03b822e7db4e043d
diff --git a/test/etc/run-test-jar b/test/etc/run-test-jar
index 7453823..8407b49 100755
--- a/test/etc/run-test-jar
+++ b/test/etc/run-test-jar
@@ -1066,7 +1066,7 @@
 
     mkdir -p ${mkdir_locations} || exit 1
     $setupapex_cmdline || { echo "zipapex extraction failed." >&2 ; exit 2; }
-    $installapex_cmdline || { echo "zipapex install failed." >&2 ; exit 2; }
+    $installapex_cmdline || { echo "zipapex install failed. cmd was: ${installapex_cmdline}." >&2; find ${mkdir_locations} -type f >&2; exit 2; }
     $linkroot_cmdline || { echo "create symlink android-root failed." >&2 ; exit 2; }
     $linkroot_overlay_cmdline || { echo "overlay android-root failed." >&2 ; exit 2; }
     $profman_cmdline || { echo "Profman failed." >&2 ; exit 2; }