Motivation: with "USE_CWRAPPERS=yes" on the default case-insensitive
OS X filesystem, linking the wrappers was failing, stopping the
build. For example:
===> Creating toolchain wrappers for mess822-0.58nb3
ln: .../pkgsrc-current/mail/mess822/work/.cwrapper/bin/cc: File exists
*** Error code 1
Stop.
I never noticed this with the old wrappers, but they've also been
failing to link "CC" as an alias to "c++"; it's just that the failure
has been silent and I've never noticed a build failure for lack of
a "CC" wrapper, despite there probably never having been such a
wrapper.
Given that jperkin's SmartOS bulk build with this change produced
results similar to last week's non-cwrappers trunk build, we can
conclude that across platforms, the need for a "CC" wrapper is very
limited and we needn't try (and sometimes fail) to create one by
default.
