If the tar.gz already existed on the target device the instruments would
fail. This fix adds the "-f" option to gzip to force it to overwrite the
file.
Commit 724f6e590e changed sysfile_getter
behavior to first tar up copied files and then gzip them. Tarball name
needs to be updated to not include '.gz' extension.
When no files are listed for one the specified directoris, the
instrument checks whether there are any files in that directory on the
device. If that directory itself does not exist; that will result in an
error. This is now handled correctly.
On some systems the temporary directory may still be "busy" after WA is
don't with it. Since it's just an empty dir and it will be reused on the
subsequent runs; do check if rm -rf succeeded.
Updating SysfsExtractor with a parameter to explicitly enable/disable
tempfs caching. Previously, this was determined entirely by whether the
device is rooted.
