[MacPorts] #56322: rust @1.26.0: buid failed on OS X <= 10.9

[MacPorts]

#56322: rust @1.26.0: buid failed on OS X <= 10.9
---------------------+-----------------------
  Reporter:  l2dy    |      Owner:  g5pw
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:  legacy-os
      Port:  rust    |
---------------------+-----------------------

Comment (by kencu):

 perhaps we need to bump this test in the `librsvg` Portfile up to 10.10
 then:
 {{{
 if {${os.platform} eq "darwin" && ${os.major} < 14} {
     # revert to latest pre-cargo version
     version         2.40.20
     epoch           1

     checksums       rmd160  e697e1220779f77e81a890718ef5cda5b5e6b740 \
                     sha256
 cff4dd3c3b78bfe99d8fcfad3b8ba1eee3289a0823c0e118d78106be6b84c92b \
                     size    1796376
 } else {
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/56322#comment:31>
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