[Qt] Build linguist/lrelease instead of the whole linguist package

Summary: The build is broken on linux64

Test Plan:

make -C ../depends HOST=$HOST

For hosts: x86_64-apple-darwin11, i686-pc-linux-gnu, x86_64-linux-gnu, arm-linux-gnueabihf, aarch64-linux-gnu, x86_64-w64-mingw32, i686-w64-mingw32

Reviewers: schancel, #bitcoin_abc

Reviewed By: schancel, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D853