FindGit: Fix check for Windows host
When cross-compiling to or from a Windows platform we should still
find a Git for the host environment.
diff --git a/Modules/FindGit.cmake b/Modules/FindGit.cmake
index 769c6c3..b830c08 100644
--- a/Modules/FindGit.cmake
+++ b/Modules/FindGit.cmake
@@ -30,7 +30,7 @@
# Prefer .cmd variants on Windows unless running in a Makefile
# in the MSYS shell.
#
-if(WIN32)
+if(CMAKE_HOST_WIN32)
if(NOT CMAKE_GENERATOR MATCHES "MSYS")
set(git_names git.cmd git eg.cmd eg)
# GitHub search path for Windows
