(ITS#8553) LMDB Windows UWP Patch

[smlu@s5.net]

Full_Name: Crt Vavros
Version: 0.9.70
OS: Windows 10
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (89.142.169.104)


This patch updates LMDB library code to compile under windows UWP platform. The
patch was made against mdb.master branch [4bc270a2c] (21.12.2016).
Note that the code was not modified much, merely additional code was added to
existing one. The code had to be adapted to compile under C++ standards (LMDB
lib cannot be compiled as C code under UWP platform). This is handled via "TC"
macro which casts "raw type" to appropriate type when compiling library under
C++, it should do nothing when compiling as C code.

The test github repo can be found at https://github.com/ZeroPass/lmdb (Note that
this port is not made aginst the latest commit)

Patch was uploaded to ftp.openldap.org/incoming