stats: define WIN32_LEAN_AND_MEAN when including windows.h
stats: define WIN32_LEAN_AND_MEAN when including windows.h

Reduce the amount of the header that we end up including in the build.  The
additional definitions are not necessary.

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@280146 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt