pgsql: Make formatting in nls.mk files more consistent

Make formatting in nls.mk files more consistent

Some of the nls.mk files used different indentation or line breaks
than the majority, which makes editing these files unnecessarily
confusing.

Branch
------
master

Details
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https://git.postgresql.org/pg/commitdiff/2e810bdb7f0a32329a7f3868fae6e81cacc3cd04

Modified Files
--------------
src/backend/nls.mk | 36 ++++++++++++++++++------------------
src/bin/pg_combinebackup/nls.mk | 12 ++++++------
src/bin/pg_dump/nls.mk | 5 +++--
src/bin/pg_rewind/nls.mk | 5 +++--
src/bin/pg_upgrade/nls.mk | 17 ++++++++++-------
src/bin/pg_waldump/nls.mk | 5 +++--
src/pl/plpython/nls.mk | 13 ++++++++-----
7 files changed, 51 insertions(+), 42 deletions(-)