Enable Codevelop build for blueos

Currently getting a compile flag that is ill formed:

-Xcompiler= -Xcompiler=-fopenmp=libomp

the first -Xcompiler= causes the rest to be past to the host compiler, which cannot understand the second -Xcompiler=.

Also there are a lot of CMake warnings about our built zlib package. For example:

CMake Warning at cmake/blt/cmake/BLTMacros.cmake:770 (add_executable):
  Cannot generate a safe runtime search path for target
  simple_conduction_with_input_file because files in some directories may
  conflict with libraries in implicit directories:

    runtime library [libz.so.1] in /usr/lib64 may be hidden by files in:
      /usr/WS2/smithdev/libs/serac/blueos_3_ppc64le_ib_p9/2022_06_01_21_11_45/clang-10.0.1/zlib-1.2.12-i6lqmmtb2os46rfflvu43zelz5sv2lcb/lib

  Some of these libraries may not be found correctly.
Call Stack (most recent call first):
  examples/simple_conduction/CMakeLists.txt:7 (blt_add_executable)

Start with examples/simple_conduction/CMakeLists.txt and the BLT add_executable path in cmake/blt/cmake/BLTMacros.cmake, then reproduce the BlueOS build to inspect how the compiler flags are assembled. Done means the malformed -Xcompiler option is gone and the built zlib package no longer produces the reported CMake runtime search path warnings.