pgsql: Fix use of config-specific libraries for Windows OpenSSL

Fix use of config-specific libraries for Windows OpenSSL

Commit 614350a3 allowed for an different builds of OpenSSL libraries on
Windows, but ignored the fact that the alternative builds don't have
config-specific libraries. This patch fixes the Solution file to ask for
the correct libraries.

per offline discussions with Leonardo Cecchi and Marco Nenciarini,

Backpatch to all live branches.

Branch
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REL9_4_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/2d03daa7b8b1b8061afa80bdec85da5d761e1023

Modified Files
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src/tools/msvc/Solution.pm | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)