Fix dm-test invocation

Due to a bad merge --copy-dex-files=false was passed to the vdex_cmdline
instead of the dex2oat_cmdline.

Test: test-art-host
Bug: 178055795

Merged-In: I5b104329af899ea62dc1779800264bad6b5424a4
Change-Id: Ieb6e324232996ec8ad5119fcbf20b81d62678fd2
(cherry picked from commit 6c9431c02e739de83c7c804d64e4a4656d24d55f)
1 file changed