VS: Add v141 flag table entry for `-Zc:inline-`

The negative form of the `-Zc:inline` flag is missing from

    c:/Program Files (x86)/Microsoft Visual Studio/2017/Professional/Common7/IDE/VC/VCTargets/1033/cl.xml

so it was not included in our flag table automatically.  Add it manually.

Suggested-by: Serti Ayoub <ayb.serti@gmail.com>