Add cmdline as a compilation reason

Set the compiler reason to 'cmdline' when the compilation was
initiated from cmdline. This will effectivively eliminate the
'unknown' reason from our metrics (except in some corner cases)

Test: adb shell cmd compile ...
Bug: 188655918
Change-Id: I0cb6e9182530bc2d88975af185a0a8256fae2c2c
4 files changed