Misc fixes before v1.8.0 release (#239)

* Update timemory submodule for OMPT

- Updated OMPT support for OpenMP 5.2

* omnitrace exe cleanup

- fixed "omnitrace --" segfault
- added nullptr checks

* CMake updates

- moved omnitrace-interface-library definition up a directory
- general cleanup
- fixed branch/tag/ref for git submodule checkouts

* Improve shutdown of causal profiling after duration limit

* Fix dyninst minimum version number

* Removed debug print from binary::get_link_map

* Remove use of thread-pool in causal

* Relax causal testing when variance is high

* causal_gotcha utilities for blocking signals

* Tweak to causal example

* Install validate-causal-json as omnitrace-causal-print

* simplify address_multirange

* improve causal line saving

source/docs/installation.md

@@ -114,7 +114,7 @@ and Dyninst requires TBB), and the CMake option to build the package alongside o
 
 | Third-Party Library | Minimum Version | Required By | CMake Option                              |
 |---------------------|-----------------|-------------|-------------------------------------------|
-| Dyninst             | 10.0            | OmniTrace   | `OMNITRACE_BUILD_DYNINST` (default: OFF)  |
+| Dyninst             | 12.0            | OmniTrace   | `OMNITRACE_BUILD_DYNINST` (default: OFF)  |
 | Libunwind           |                 | OmniTrace   | `OMNITRACE_BUILD_LIBUNWIND` (default: ON) |
 | TBB                 | 2018.6          | Dyninst     | `DYNINST_BUILD_TBB` (default: OFF)        |
 | ElfUtils            | 0.178           | Dyninst     | `DYNINST_BUILD_ELFUTILS` (default: OFF)   |