Use "go32" instead of "msdos" for future expansion.

Add ^M to end of each line.

From-SVN: r9587

gcc/configure.bat

 @echo off
-if %1.==msdos. goto call_msdos
+if %1.==go32. goto call_go32
 if %1.==winnt. goto call_winnt
-echo Usage: configure msdos or configure winnt
+echo Usage: configure go32 or configure winnt cpu
 goto END
 
-:call_msdos
+:call_go32
 call config\msdos\configure %1 %2 %3 %4
 goto END
 
@@ -13,3 +13,4 @@ call config\%2\config-nt %1 %2 %3 %4
 goto END
 
 :END
+