Merge branch 'azamat/knl/rm-clubb-mkl-div-by-0-halts' (PR #2208)

Turn on FP exception checking on KNL nodes with Intel compiler.

Also, don't halt on div-by-0 in a clubb MKL call on KNLs when
FP exception-checking (-fpe0) is turned on. This makes debug and
non-debug runs behave the same with -fpe0 on.

[BFB]

config/e3sm/machines/config_compilers.xml

@@ -609,7 +609,7 @@ for mct, etc.
 <!-- Intel v18 is default on cori-knl and cori-haswell -->
 <compiler COMPILER="intel" MACH="cori-knl">
   <FFLAGS> -convert big_endian -assume byterecl -ftz -traceback -assume realloc_lhs -fp-model consistent -fimf-use-svml </FFLAGS>
-  <ADD_FFLAGS DEBUG="FALSE"> -O2 -debug minimal -qno-opt-dynamic-align </ADD_FFLAGS>
+  <ADD_FFLAGS DEBUG="FALSE"> -O2 -debug minimal -qno-opt-dynamic-align -fpe0</ADD_FFLAGS>
   <ADD_CFLAGS compile_threaded="true"> -qopenmp </ADD_CFLAGS>
   <ADD_FFLAGS compile_threaded="true"> -qopenmp </ADD_FFLAGS>
   <ADD_FFLAGS_NOOPT compile_threaded="true"> -qopenmp </ADD_FFLAGS_NOOPT>
@@ -1115,7 +1115,7 @@ for mct, etc.
   <SCC> icc </SCC>
   <SCXX> icpc </SCXX>
   <FFLAGS>-convert big_endian -assume byterecl -ftz -traceback -assume realloc_lhs -fp-model consistent -fimf-use-svml</FFLAGS>
-  <ADD_FFLAGS DEBUG="FALSE"> -O2 -debug minimal -qno-opt-dynamic-align </ADD_FFLAGS>
+  <ADD_FFLAGS DEBUG="FALSE"> -O2 -debug minimal -qno-opt-dynamic-align -fpe0</ADD_FFLAGS>
   <ADD_CFLAGS compile_threaded="true"> -qopenmp </ADD_CFLAGS>
   <ADD_FFLAGS compile_threaded="true"> -qopenmp </ADD_FFLAGS>
   <ADD_FFLAGS_NOOPT compile_threaded="true"> -qopenmp </ADD_FFLAGS_NOOPT>