[MacPorts] #53617: isl: Update to 0.18

[MacPorts]

#53617: isl: Update to 0.18
-------------------------+---------------------------------
  Reporter:  ryandesign  |      Owner:  MarcusCalhoun-Lopez
      Type:  update      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:  fixed       |   Keywords:
      Port:  isl         |
-------------------------+---------------------------------

Comment (by mojca):

 In [changeset:"af91de7251fbd3f0c8b400bea541071d0a4ba59f/macports-ports"
 af91de7251fbd3f0c8b400bea541071d0a4ba59f/macports-ports]:
 {{{
 #!ConfigurableCommitTicketReference repository="macports-ports"
 revision="af91de7251fbd3f0c8b400bea541071d0a4ba59f"
 *-w64-mingw32-gcc: revbump after isl update

 Revbump cross-compilers after isl update:
 * i686-w64-mingw32-gcc
 * x86_64-w64-mingw32-gcc

 See: https://trac.macports.org/ticket/53617
 }}}

--
Ticket URL: <https://trac.macports.org/ticket/53617#comment:4>
MacPorts <https://www.macports.org/>
Ports system for macOS