Add Fujitsu compiler to Spack. (#11287)

* Add Fujitsu compiler to Spack.

* Fixes for flake8

* Chenges location of FCC to subdirectory called case-insensitive

* Add compiler tests for Fujitsu compiler

* Modify the logic of taking compiler version for new version of Fujitsu compiler

lib/spack/env/cc

@@ -103,25 +103,25 @@ case "$command" in
     cpp)
         mode=cpp
         ;;
-    cc|c89|c99|gcc|clang|armclang|icc|pgcc|xlc|xlc_r)
+    cc|c89|c99|gcc|clang|armclang|icc|pgcc|xlc|xlc_r|fcc)
         command="$SPACK_CC"
         language="C"
         comp="CC"
         lang_flags=C
         ;;
-    c++|CC|g++|clang++|armclang++|icpc|pgc++|xlc++|xlc++_r)
+    c++|CC|g++|clang++|armclang++|icpc|pgc++|xlc++|xlc++_r|FCC)
         command="$SPACK_CXX"
         language="C++"
         comp="CXX"
         lang_flags=CXX
         ;;
-    ftn|f90|fc|f95|gfortran|flang|armflang|ifort|pgfortran|xlf90|xlf90_r|nagfor)
+    ftn|f90|fc|f95|gfortran|flang|armflang|ifort|pgfortran|xlf90|xlf90_r|nagfor|frt)
         command="$SPACK_FC"
         language="Fortran 90"
         comp="FC"
         lang_flags=F
         ;;
-    f77|xlf|xlf_r|pgf77)
+    f77|xlf|xlf_r|pgf77|frt)
         command="$SPACK_F77"
         language="Fortran 77"
         comp="F77"

lib/spack/env/fj/case-insensitive/FCC

@@ -0,0 +1 @@
+../../cc

lib/spack/env/fj/fcc

@@ -0,0 +1 @@
+../cc

lib/spack/env/fj/frt

@@ -0,0 +1 @@
+../cc