[MacPorts] #71729: port deps misdetects dependencies on Rosetta

[MacPorts]

#71729: port deps misdetects dependencies on Rosetta
--------------------------+--------------------
 Reporter:  barracuda156  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  base          |    Version:  2.10.5
 Keywords:                |       Port:
--------------------------+--------------------
 This on 10.6.8 on x86 (''not on powerpc''):

 {{{
 macmini:~ svacchanda$ port deps LimeChat
 Full Name: LimeChat @2.26_1
 Build Dependencies:   clang-11
 Library Dependencies: libcxx
 macmini:~ svacchanda$ port deps LimeChat build_arch="ppc"
 Full Name: LimeChat @2.26_1
 Build Dependencies:   clang-11
 Library Dependencies: libcxx
 }}}

 However nothing in the port requires clang or x86, it builds fine even on
 10.5 ppc (I fixed it, and nothing changed since then, it is pegged for <
 10.7).

 Notice, build works correctly, i.e. it does not try to fetch clang:
 {{{
 --->  Fetching distfiles for LimeChat
 --->  limechat-2.26.tar.gz does not exist in
 /opt/local/var/macports/distfiles/LimeChat
 --->  Attempting to fetch limechat-2.26.tar.gz from
 https://github.com/psychs/limechat/archive/2.26
   % Total    % Received % Xferd  Average Speed   Time    Time     Time
 Current
                                  Dload  Upload   Total   Spent    Left
 Speed
   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--
 0
 100 3483k    0 3483k    0     0  1056k      0 --:--:--  0:00:03 --:--:--
 1745k
 --->  Verifying checksums for LimeChat
 --->  Checksumming limechat-2.26.tar.gz
 --->  Extracting LimeChat
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/71729>
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