Add missing file.

src/interfaces/libpq/libpq.rc

+#include <winver.h>
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION 6,4,0,0
+ PRODUCTVERSION 6,4,0,0
+ FILEFLAGSMASK 0x3fL
+ FILEFLAGS 0
+ FILEOS VOS__WINDOWS32
+ FILETYPE VFT_DLL
+ FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904B0"
+        BEGIN
+            VALUE "CompanyName", "\0"
+            VALUE "FileDescription", "PostgreSQL Access Library\0"
+            VALUE "FileVersion", "6, 4, 0, 0\0"
+            VALUE "InternalName", "libpq\0"
+            VALUE "LegalCopyright", "Copyright (C) 1998\0"
+            VALUE "LegalTrademarks", "\0"
+            VALUE "OriginalFilename", "libpq.dll\0"
+            VALUE "ProductName", "PostgreSQL\0"
+            VALUE "ProductVersion", "6, 4, 0, 0\0"
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1200
+    END
+END