[BUG]: Segmentation fault when running C benchmarks

## Checklist

> Please ensure the following tasks are completed before filing a bug report.

- [x] Read and understood the [Code of Conduct][code-of-conduct].
- [x] Searched for existing issues and pull requests.

## Description

> Description of the issue.

Am encountering a `Segmentation fault (core dumped)` error when running C benchmarks of mathematical functions.

## Questions

> Any questions for reviewers?

No.

## Other

> Any other information relevant to this issue? This may include screenshots, references, stack traces, sample output, and/or implementation notes.

The issue seems to be due to the benchmarks overflowing the default maximum stack size of 8 MB.
Increasing the stack size via e.g. `ulimit -s 32767` causes the benchmarks to run properly.

We might want to rethink whether to allocate memory with `malloc`.

#### Reproduction

> What steps are required to reproduce the unexpected output?

In order to reproduce this bug, do the following:

- From the top-level `stdlib` directory, run

```
make benchmark-c BENCHMARKS_FILTER=.*/dsqrt/.*
```

#### Expected Results

> What are the expected results?

The benchmarks should run without issues.

#### Actual Results

> What are the actual results?

The following are the actual results:

```text
(...)
ok 14 benchmark finished
# c::dsqrt:len=100000
---
iterations: 1000
elapsed: 0.429753065
rate: 2326.917667814
...
ok 15 benchmark finished
# c::dsqrt:len=1000000
Makefile:133: recipe for target 'run' failed
make[1]: *** [run] Segmentation fault (core dumped)
make[1]: Leaving directory '/home/philipp/git/stdlib/lib/node_modules/@stdlib/math/strided/special/dsqrt/benchmark/c'
/home/philipp/git/stdlib/tools/make/lib/benchmark/c.mk:48: recipe for target 'benchmark-c' failed
make: *** [benchmark-c] Error 1
```

#### Environments

> What environments are affected (e.g., `Node v0.4.x`, `Chrome`, `IE 11`)? If Node.js, include the `npm` version, operating system, and any other potentially relevant platform information.

The following environments are affected:

- Linux Ubuntu

[code-of-conduct]: https://github.com/stdlib-js/stdlib/blob/develop/CODE_OF_CONDUCT.md

Start by running `make benchmark-c BENCHMARKS_FILTER=.*/dsqrt/.*` from the top-level stdlib directory. Inspect the C benchmark path under `lib/node_modules/@stdlib/math/strided/special/dsqrt/benchmark/c`, along with `Makefile:133` and `tools/make/lib/benchmark/c.mk:48`, to trace the failure. Done means the benchmark completes without a segmentation fault under the default stack limit.

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