Update parallelization settings on Linaro builders

Summary:
- Remove -DLLVM_PARALLEL_LINK_JOBS=2 from Linaro builders now running
      on server-class hardware (vs Nvidia TK1 boards with 2GB RAM previously)
    - Reduce testsuite parallelism on Linaro builders from 96 to 32.
      These builders share either a 64-core machine or a 32-core machine,
      so trying for 96-thread parallelism is excessive.

Reviewers: gkistanova, olista01, rovka, yroux

Reviewed By: gkistanova, yroux

Differential Revision: https://reviews.llvm.org/D79161
1 file changed