pgsql: Add getopt() support to test_fsync; also fix printf() format pr

Add getopt() support to test_fsync; also fix printf() format problem.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=08af45f4ff89ff5bee25c7d5bf496e987eb90060

Modified Files
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src/tools/fsync/README | 8 ++++-
src/tools/fsync/test_fsync.c | 59 ++++++++++++++++++++++++++++++-----------
2 files changed, 49 insertions(+), 18 deletions(-)