patch 7.4.2288
Problem:    MS-Windows build instructions are clumsy. "dosbin" doesn't build.
Solution:   Add rename.bat. Fix building "dosbin".
diff --git a/tools/rename.bat b/tools/rename.bat
new file mode 100644
index 0000000..d66b0d3
--- /dev/null
+++ b/tools/rename.bat
@@ -0,0 +1,6 @@
+mv vim.exe vimw32.exe
+mv tee/tee.exe teew32.exe
+mv xxd/xxd.exe xxdw32.exe
+mv vim.pdb vimw32.pdb
+mv install.exe installw32.exe
+mv uninstal.exe uninstalw32.exe