shell_tools: Acquire absolute entrypoint path
shell_tools: Acquire absolute entrypoint path

Change-Id: I97a2172be3f292cec1225e1dcb13785b511e1487
Signed-off-by: Adrian DC <01fb3892f39957945220431e7409156544d2f041@gmail.com>

AdrianDC/android_development_shell_tools,AdrianDC/android_development_shell_tools