harfbuzz: Disable auto-features which pull in system dependencies

[jwillikers]

Harfbuzz autodetects cairo and pulls it in, which breaks reproducibility. This also breaks cross compilation by pulling in dependencies on the build system. Disabling auto features in Meson stops this unexpected behavior from happening. See here

[AbrilRBS]

Looks good to me :)

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 3 (91208f307b5d3be8fff8aa5c9ea49d3c3dfce777):

• harfbuzz/8.3.0:
  All packages built successfully! (All logs)

• harfbuzz/8.2.2:
  All packages built successfully! (All logs)

• harfbuzz/8.2.1:
  All packages built successfully! (All logs)

• harfbuzz/8.1.1:
  All packages built successfully! (All logs)

• harfbuzz/7.3.0:
  All packages built successfully! (All logs)

• harfbuzz/8.0.1:
  All packages built successfully! (All logs)

• harfbuzz/6.0.0:
  All packages built successfully! (All logs)

• harfbuzz/5.1.0:
  All packages built successfully! (All logs)

---

Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 3 (91208f307b5d3be8fff8aa5c9ea49d3c3dfce777):

• harfbuzz/8.3.0:
  All packages built successfully! (All logs)

• harfbuzz/8.2.2:
  All packages built successfully! (All logs)

• harfbuzz/8.2.1:
  All packages built successfully! (All logs)

• harfbuzz/8.0.1:
  All packages built successfully! (All logs)

• harfbuzz/8.1.1:
  All packages built successfully! (All logs)

• harfbuzz/6.0.0:
  All packages built successfully! (All logs)

• harfbuzz/7.3.0:
  All packages built successfully! (All logs)

• harfbuzz/5.1.0:
  All packages built successfully! (All logs)