BaseTools LzmaCompress: Fix GCC warning misleading-indentation

BaseTools LzmaCompress: Fix GCC warning misleading-indentation

GCC 6 or above reports the warning misleading-indentation.
This patch fixes it.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1234
[lersek@redhat.com: reference the BZ that got reported meanwhile]