emulator: Enable verbose mode when -verbose is used.

Before this patch, the only way to print debug messages from the
'emulator' launcher program was to define ANDROID_EMULATOR_DEBUG=1
in your environment.

This patch modifies the program to detect one of the following
on the command-line to also enable these debug messages:

  -verbose
  -debug-all
  -debug all

Change-Id: Ide96680f7eb4295cd69a903c5f9c576d7d0f7e88
1 file changed