[PATCH] Fix for SVN 1.8 with sqlite >= 3.12.0 and VS 2005+

Hi,

building SVN 1.8 using sqlite >= SQLite 3.12.0 (amalgamation) and VS
2005+ raises the following error:

[...]\sqlite\sqlite3.c(42437): error C4013: 'rand_s' undefined; assuming
extern returning int
[[...]\1.8.16\build\win32\vcnet-vcproj\test_wc_queries.vcxproj]

The issue does not exist in SVN != 1.8 as far as I see. Full details
available here: http://www.luke1410.de:8090/browse/MAXSVN-58

The attached patch (based on the patch fixing the related issue in 1.7)
resolves that by moving the sqlite3.c-include section to be first
include statement in the file.

If it's ok, I'll just add a 1.8 backport branch and nominate it for
backporting to the 1.8-branch.

Regards,
Stefan