fix: proto-update-deps target on macOS

[nicopernas]

Description

As noted in #1798, the proto-update-deps make target is broken on macOS. The culprit is a sed command that works slightly different in its freebsd implementation.
This PR replaces the sed command in the makefile target with a perl oneliner that is arguably easier to read and it works on both macOS and GNU systems.

This only fixes part of the problem described in #1798 though.

---

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[colin-axner]

Thanks for fixing this! Testing on a GNU system I get:

 make proto-update-deps
syntax error at -e line 1, near "if  =="
Execution of -e aborted due to compilation errors.
make: *** [Makefile:450: proto-update-deps] Error 255

[nicopernas]

Thanks for fixing this! Testing on a GNU system I get:

 make proto-update-deps
syntax error at -e line 1, near "if  =="
Execution of -e aborted due to compilation errors.
make: *** [Makefile:450: proto-update-deps] Error 255

Yeah, silly me. make was interpolating the $ in the perl code. New revision should do the trick. Sorry for that.

[seantking]

Works for me on Ubuntu 👍

[colin-axner]

Great, thanks!

[faddat]

In a nerdy industry, this is one of the nerdiest PR's I've seen

-- and quite useful, too!

Thanks!

PS: Who wrote the migration docs that included the line "on a gnu/linux machine....."?

epic (at the time, they were the finest/only migration docs. I upgraded several chains following those instructions.)

[colin-axner]

thanks again @nicopernas :)