Issue #17202: Add .bat to .hgeol to force them to CRLF.

Using LF can a script to fail if it tries to use a label that is
split across 512 byte blocks.  Who knows why.
diff --git a/PCbuild/env.bat b/PCbuild/env.bat
index 08dc8ef..8b64ce5 100644
--- a/PCbuild/env.bat
+++ b/PCbuild/env.bat
@@ -1,9 +1,9 @@
-@echo off
-set VS10=%ProgramFiles(x86)%\Microsoft Visual Studio 10.0
-IF EXIST "%VS10%" GOTO ok
-set VS10=%ProgramFiles%\Microsoft Visual Studio 10.0
-:ok
-
-echo Build environments: x86, ia64, amd64, x86_amd64, x86_ia64
-echo.
-call "%VS10%\VC\vcvarsall.bat" %1
+@echo off

+set VS10=%ProgramFiles(x86)%\Microsoft Visual Studio 10.0

+IF EXIST "%VS10%" GOTO ok

+set VS10=%ProgramFiles%\Microsoft Visual Studio 10.0

+:ok

+

+echo Build environments: x86, ia64, amd64, x86_amd64, x86_ia64

+echo.

+call "%VS10%\VC\vcvarsall.bat" %1