LU-1205 tests: cleanup code style in mmap_sanity.c

LU-1205 tests: cleanup code style in mmap_sanity.c

Cleanup numerous code style issues in the mmap_sanity.c test:
- whitespace at end of line
- spaces around operators
- indentation
- line wrapping at 80 columns

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I7481d358732effa58875cbf2a2d545bf741ecab0
Reviewed-on: http://review.whamcloud.com/2291
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Yu Jian <yujian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>