[COMMITTERS] pgsql: Fix macro-redefinition warning on MSVC.

Fix macro-redefinition warning on MSVC.

In commit 9d6b160d7, I tweaked pg_config.h.win32 to use
"#define HAVE_LONG_LONG_INT_64 1" rather than defining it as empty,
for consistency with what happens in an autoconf'd build.
But Solution.pm injects another definition of that macro into
ecpg_config.h, leading to justifiable (though harmless) compiler whining.
Make that one consistent too.  Back-patch, like the previous patch.

Discussion: https://postgr.es/m/CAEepm=1dWsXROuSbRg8PbKLh0S=8Ou-V8sr05DxmJOF5chBxqQ@mail.gmail.com

Branch
------
REL_10_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/d5c65d2f11ac58c517ab7fda01be62e4763504c9

Modified Files
--------------
src/tools/msvc/Solution.pm | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)