pgsql: Fix assorted inconsistent function declarations.

Fix assorted inconsistent function declarations.

While gcc doesn't complain if you declare a function "static" and then
define it not-static, other compilers do; and in any case the code is
highly misleading this way. Add the missing "static" keywords to a
couple of recent patches. Per buildfarm member pademelon.

Branch
------
REL9_2_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/6a560f5b5ff889ae252b9d8ee1f45b616fd6adbc

Modified Files
--------------
contrib/pg_upgrade/pg_upgrade.c | 2 +-
src/bin/pg_resetxlog/pg_resetxlog.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

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