[PATCH v2 1/2] configure: Disable SFrame backtracing

[Claudiu Zissulescu-Ianculescu]

>> -if test $use_sframe$libc_cv_default_sframe = yesyes || \
>> -   test $use_sframe$libc_cv_default_sframe = notsetyes; then
>> -  enable_gsframe=yes
>> -elif test $use_sframe = yes; then
>> -   AC_MSG_FAILURE([toolchain doesn't support SFrame v2 or higher])
> 
> I commented on this before but wasn't so bothered by it, but kind of
> changed my mind now: don't we want to error out with explicit
> --enable-sframe if our Binutils is too old?
> 
If it is too old, the SFrame will not be enabled anyhow, as either is
not supported or its output is not suitable.

However, I can reintroduce the error message if required.

//Claudiu