Use dlmopen when trying to inject heaptrack_inject.
Use dlmopen when trying to inject heaptrack_inject.

Some systems use an optimized dlopen symbol (especially embeded linux
modifications), but these don't touch dlmopen, which is more general.

This prevents an "dlopen - symbol not found" error when trying to
inject heaptrack on such systems to a running process.

stormspirit/heaptrack,muojp/heaptrack,stormspirit/heaptrack,stormspirit/heaptrack,muojp/heaptrack,muojp/heaptrack,muojp/heaptrack,muojp/heaptrack