vcbuild/README: update to accommodate for missing common-cmds.h

In 60f487a (Remove common-cmds.h, 2018-05-10), we forgot to adjust
this README when removing the common-cmds.h file.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

compat/vcbuild/README

@@ -81,8 +81,8 @@ The Steps of Build Git with VS2008
    the git operations.
 
 3. Inside Git's directory run the command:
-       make common-cmds.h
-   to generate the common-cmds.h file needed to compile git.
+       make command-list.h
+   to generate the command-list.h file needed to compile git.
 
 4. Then either build Git with the GNU Make Makefile in the Git projects
    root