[Skiboot] [PATCH] Use $() rather than backticks in all shell

[Stewart Smith]

Stewart Smith <stewart at linux.ibm.com> writes:
> The cool kids are all using $() these days as backticks are all
> backwards and uncool.
>
> Practically speaking, it makes it easier to escape things, nest things,
> and all the other reasons listed on
> http://mywiki.wooledge.org/BashFAQ/082

Merged to master as of 084e37bab1cf6fb334af3f2c8a77f0f260eb91fe

-- 
Stewart Smith
OPAL Architect, IBM.