pgsql: Temporarily revert "Move pg_lzcompress.c to src/common."

Temporarily revert "Move pg_lzcompress.c to src/common."

This reverts commit 60838df922345b26a616e49ac9fab808a35d1f85.
That change needs a bit more thought to be workable. In view of
the potentially machine-dependent stuff that went in today,
we need all of the buildfarm to be testing those other changes.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/966115c305c297cf4a1ec5ebbd0a55be46ff33ad

Modified Files
--------------
src/backend/access/heap/tuptoaster.c | 11 +-
src/backend/utils/adt/Makefile | 4 +-
src/backend/utils/adt/pg_lzcompress.c | 779 ++++++++++++++++++++++++++++++++
src/common/Makefile | 3 +-
src/common/pg_lzcompress.c | 786 ---------------------------------
src/include/common/pg_lzcompress.h | 112 -----
src/include/utils/pg_lzcompress.h | 112 +++++
src/tools/msvc/Mkvcbuild.pm | 3 +-
8 files changed, 899 insertions(+), 911 deletions(-)