compiletest: Allow for tests requiring profiler-rt or sanitizer-rt support.
compiletest: Allow for tests requiring profiler-rt or sanitizer-rt support.

aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust