ARROW-16570: [R] Make pkg-config commands find all of the libs

[nealrichardson]

See discussion at https://lists.apache.org/thread/7brfhv6mzc392jqo04o1jp5vos7g7lnj

We don't currently have any CI that triggers the case @rvernica reported there.

[github-actions]

https://issues.apache.org/jira/browse/ARROW-16570

[github-actions]

⚠️ Ticket has not been started in JIRA, please click 'Start Progress'.

[kou]

+1

Can someone confirm that this solves the problem?

[kou]

It seems that nobody can confirm this before we merge.

I'll merge this.

[ursabot]

Benchmark runs are scheduled for baseline = a71e5f0 and contender = cb5c039. cb5c039 is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Finished ⬇️0.0% ⬆️0.0%] ec2-t3-xlarge-us-east-2
[Failed ⬇️0.27% ⬆️0.0%] test-mac-arm
[Finished ⬇️0.71% ⬆️0.0%] ursa-i9-9960x
[Finished ⬇️0.67% ⬆️0.12%] ursa-thinkcentre-m75q
Buildkite builds:
[Finished] cb5c039a ec2-t3-xlarge-us-east-2
[Failed] cb5c039a test-mac-arm
[Finished] cb5c039a ursa-i9-9960x
[Finished] cb5c039a ursa-thinkcentre-m75q
[Finished] a71e5f0d ec2-t3-xlarge-us-east-2
[Finished] a71e5f0d test-mac-arm
[Finished] a71e5f0d ursa-i9-9960x
[Finished] a71e5f0d ursa-thinkcentre-m75q
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java

[ursabot]

['Python', 'R'] benchmarks have high level of regressions.
ursa-i9-9960x