Framework: Upgrade the buld Linux-GCC-4.7.2-CONTINUOUS_MPI_OPT_DEV_SHARED to GCC 4.8.4 or disable

Created by: bartlettroscoe

CC: @trilinos/framework

Description:

The build Linux-GCC-4.7.2-CONTINUOUS_MPI_OPT_DEV_SHARED with configure output shown at:

• https://testing.sandia.gov/cdash/viewConfigure.php?buildid=3022476

is still using GCC 4.7.2 shown by:

-- CMAKE_C_COMPILER_ID='GNU'
-- CMAKE_C_COMPILER_VERSION='4.7.2'
-- CMAKE_CXX_COMPILER_ID='GNU'
-- CMAKE_CXX_COMPILER_VERSION='4.7.2'

Trilinos is no longer supports C++11 builds of Trilinos with GCC versions less than 4.8.4 (see #1453 (closed)). Therefore, this build needs to be upgraded to GCC 4.8.4. Until this build can be updated, it should be disabled. See history in https://github.com/trilinos/Trilinos/issues/1304#issuecomment-318357060.