Add VS2013 tool chain in BaseTools\Conf\tools_def.template. Also, two issues came...

Add VS2013 tool chain in BaseTools\Conf\tools_def.template.  Also, two issues came up related to vs2013 build and caused the build to fail.

Vs2013 issue #1:  warning message about uninitialized variables or pointers like this:
s:\incbld\ia32\intelframeworkmodulepkg\bus\isa\isabusdxe\isabus.c(395) : warning C4701: potentially uninitialized local variable 'DevicePathData' used
s:\incbld\ia32\intelframeworkmodulepkg\bus\isa\isabusdxe\isabus.c(395) : warning C4703: potentially uninitialized local pointer variable 'DevicePathData' used
LINK : fatal error LNK1257: code generation failed
The following online messages shows discussions related to this vs2013 issue and how Microsoft engineer responded.  They suggest a work around by adding the initialization for the variables.
https://connect.microsoft.com/VisualStudio/feedback/details/816730/bogus-warning-from-vs-2013

Vs2013 issue #2:
C:\Program Files\Windows Kits\8.1\include\um\winnt.h(5105) : error C2220: warning treated as error - no 'object' file generated
C:\Program Files\Windows Kits\8.1\include\um\winnt.h(5105) : warning C4005: 'InterlockedCompareExchange64' : macro redefinition
This happened for Nt32Pkg.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wang, Yu <yu.wang@intel.com>
Reviewed-by: Gao, Liming <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15722 6f19259b-4bc3-4df7-8a09-765794883524