outdevcl: Cleanup soong's bootstrap outputs
outdevcl: Cleanup soong's bootstrap outputs

 * After multiple rebuilds, the .bootstrap and
    .minibootstrap might trigger build init fails

Change-Id: Ide610715f8c158eeab41e1f49931476b53e518ba
Signed-off-by: Adrian DC <01fb3892f39957945220431e7409156544d2f041@gmail.com>

AdrianDC/android_development_shell_tools,AdrianDC/android_development_shell_tools