pgsql: Update time zone data files to tzdata release 2019c.

Update time zone data files to tzdata release 2019c.

DST law changes in Fiji and Norfolk Island. Historical corrections
for Alberta, Austria, Belgium, British Columbia, Cambodia, Hong Kong,
Indiana (Perry County), Kaliningrad, Kentucky, Michigan, Norfolk
Island, South Korea, and Turkey.

Branch
------
REL_11_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/24f64fba0ad8bc0c32d0bd56b1ebd93523b7facf

Modified Files
--------------
src/timezone/data/tzdata.zi | 100 +++++++++++++++++++----------------------
src/timezone/known_abbrevs.txt | 1 +
2 files changed, 46 insertions(+), 55 deletions(-)