pgsql: Mark some more variables as static or include the appropriate he

Mark some more variables as static or include the appropriate header

Detected by clang's -Wmissing-variable-declarations.

From: Andres Freund <andres(at)anarazel(dot)de>

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/66c04c981dfe7c1d1e633dddcecf01982d0bde65

Modified Files
--------------
src/backend/commands/event_trigger.c | 2 +-
src/backend/postmaster/bgworker.c | 2 +-
src/backend/postmaster/postmaster.c | 3 +--
src/backend/storage/lmgr/s_lock.c | 1 +
src/backend/utils/init/globals.c | 1 +
src/bin/initdb/initdb.c | 2 +-
src/include/storage/pg_shmem.h | 2 +-
src/interfaces/ecpg/preproc/pgc.l | 2 +-
8 files changed, 8 insertions(+), 7 deletions(-)