pgsql: Fix dependency tracking for src/port/%_srv.o files

Fix dependency tracking for src/port/%_srv.o files

Because they use their own compilation rule, they don't use the
dependency tracking logic from Makefile.global. To make sure that
dependency tracking works anyway for the *_srv.o files, depend on
their *.o siblings as well, which do have proper dependencies. It's a
hack that might fail someday if there is a *_srv.o without a
corresponding *.o, but it works for now (and those would probably go
into src/backend/port/ anyway).

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/3420b241a7dbad8e5fe62395054bf8596f33d143

Modified Files
--------------
src/port/Makefile | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletions(-)