heisenbridge: update to 1.15.0

[ninewise]

Note: also adds a missing runtime dependency.

Testing the changes

• I tested the changes in this PR: YES

Local build testing

• I built this PR locally for my native architecture, (x86_64-glibc)
• I built this PR locally for these architectures (if supported. mark crossbuilds):
  • armv6l
  • armv6l-musl

[AnInternetTroll]

Built on x86_64-glibc for aarch64-musl. Works as expected with conduit 0.8.0