[8u] RFR: 8261952: Avoid converting path to vcruntime140.dll to short-style path

[Dmitry Cherepanov]

Bug: https://bugs.openjdk.java.net/browse/JDK-8261952
Webrev: http://cr.openjdk.java.net/~dcherepanov/openjdk8u/8261952/webrev.v0/

Please review the partial backport for Windows build with VS 2017.
This is to avoid converting path to vcruntime140.dll  to short-style path (with vcrunt~1.dll)

In JDK 11, it was fixed as a part of https://bugs.openjdk.java.net/browse/JDK-8201267
 From original RFR: https://mail.openjdk.java.net/pipermail/build-dev/2018-April/021563.html

* In toolchain_windows.m4, the BASIC_FIXUP_PATH was redundant as all
   directories sent in here are already fixed. Calling it here messes up
   the filename of the dll, which in VS2017 is more than 8 chars.

Thanks,

Dmitry