Add custom ninja binaries.

ninja.exe built with MSVC 2012
from
https://github.com/rjogrady/ninja/commit/78e448969614ce4222707d8ef55dbadcab56eea2

ninja-linux64 built with gcc
from
https://github.com/rjogrady/ninja/commit/78e448969614ce4222707d8ef55dbadcab56eea2
diff --git a/ninja-linux64 b/ninja-linux64
index 1f30022..6ef086d 100755
--- a/ninja-linux64
+++ b/ninja-linux64
Binary files differ
diff --git a/ninja.exe b/ninja.exe
index 6920283..c240d73 100755
--- a/ninja.exe
+++ b/ninja.exe
Binary files differ