pgsql: Properly install gram.h on MSVC builds

Properly install gram.h on MSVC builds

This file is now needed by pgAdmin builds, which started
failing since it was missing in the installer builds.

Branch
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REL9_0_STABLE

Details
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http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=763072ba8fd48dc3b16a14b14220988a8fe07e0e

Modified Files
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src/tools/msvc/Install.pm | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)