Reduce unnecessary work in dependency builds

- Pin Silo to 4.12.0 release tag (instead of a post-release commit hash)
  so GIT_SHALLOW works, making the clone faster
- Disable ZFP compression in Silo (MFC never uses Silo compression)
- Remove invalid -DFORTRAN_LIBRARIES=ON from HDF5 (not a real HDF5
  variable); explicitly disable unneeded features: C++ bindings,
  Fortran bindings, and parallel I/O

Author: sbryngelson

src/simulation/m_global_parameters.fpp

@@ -1,6 +1,6 @@
 !>
 !! @file
-!! @brief Contains module m_global_parameters
+!! @brief Contains module m_global_parameters (simulation)
 
 #:include 'case.fpp'
 #:include 'macros.fpp'

toolchain/dependencies/CMakeLists.txt

@@ -84,7 +84,7 @@ if (MFC_SILO)
 
         ExternalProject_Add(silo
             GIT_REPOSITORY "https://github.com/LLNL/Silo"
-            GIT_TAG        0cddaa6865fb49ae7b2110fa1b6f2709592abe0b
+            GIT_TAG        4.12.0
             GIT_SHALLOW    ON
             GIT_PROGRESS   ON
             PATCH_COMMAND  "${GIT_EXECUTABLE}" stash