Apparently, some /bin/sh's (specifically, the one on Mac OS X) have a  problem with assigning to the variable PWD.  Fortunately, in those cases,  the variable PWD automatically contains the path of the current working  directory, so we can just ignore the error and move on with our lives.
Apparently, some /bin/sh's (specifically, the one on Mac OS X) have a 
problem with assigning to the variable PWD.  Fortunately, in those cases, 
the variable PWD automatically contains the path of the current working 
directory, so we can just ignore the error and move on with our lives.

* subversion/tests/libsvn_subr/target-test.sh
  silence a meaningless error message.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@841170 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion