Make tremor compile on x86_64-unknown-linux-gnu

[scrabsha]

Pull request

Description

Tremor uses simd-json in order to get blazingly fast JSON parsing.
This crate aims to use CPU-specific SIMD instructions. We need to tell
rustc that these instructions are available.

Checklist

• The RFC, if required, has been submitted and approved (not required)
• Any user-facing impact of the changes is reflected in docs.tremor.rs (none)
• The code is tested
• Use of unsafe code is reasoned about in a comment
• Update CHANGELOG.md appropriately, recording any changes, bug fixes, or other observable changes in behavior
• The performance impact of the change is measured (see below) (not required)

[Licenser]

🚀 good catch!

[coveralls]

Pull Request Test Coverage Report for Build 2067553232

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 3 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.005%) to 87.367%

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Files with Coverage Reduction	New Missed Lines	%
tremor-script/src/ast/eq.rs	1	71.84%
tremor-script/src/ast/walkers.rs	1	75.35%
tremor-value/src/value.rs	1	98.7%

Totals
Change from base Build 2027316573:	0.005%
Covered Lines:	18734
Relevant Lines:	21443

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💛 - Coveralls