Bug#881663: Missing build on mips64el and mipsel

[Nicholas D Steeves]

Package: llvm-toolchain-5.0
Version: 1:5.0-4
Severity: important
Control: block 880669 by -1

Dear LLVM maintainers,

In #873410 a transition to llvm-5.0-dev was requested for irony-mode.
Would you please fix llvm-toolchain-5.0 FTBS (maybe self-tests?) on
mips64el and mipsel?

The worst-case scenario will be adding libclang-5.0-dev | libclang-4.0-dev
build-deps to irony-mode, but I believe Sylvestre's intent was for
irony-mode to use libclang-5.0-dev.

Please fix this.

Sincerely,
Nicholas