Rename CCPP branches from master to main, several small changes in cc…

…pp-physics (NOAA-EMC#300)

- renames the ccpp-framework and ccpp-physics branches from master to main in .gitmodules
- updates the submodule pointer for ccpp-physics for several small changes described in NCAR/ccpp-physics#658
- updates the submodule pointer for ccpp-framework for a small update described in NCAR/ccpp-framework#372
- add missing Intel DEBUG flags specific to CCPP

.gitmodules

@@ -5,8 +5,8 @@
 [submodule "ccpp/framework"]
 	path = ccpp/framework
 	url = https://github.com/NCAR/ccpp-framework
-	branch = master
+	branch = main
 [submodule "ccpp/physics"]
 	path = ccpp/physics
 	url = https://github.com/NCAR/ccpp-physics
-	branch = master
+	branch = main

ccpp/CMakeLists.txt

@@ -55,6 +55,14 @@ if(MPI)
   add_definitions(-DMPI)
 endif()
 
+#------------------------------------------------------------------------------
+# Set additional flags for debug build
+if(DEBUG)
+  if(CMAKE_Fortran_COMPILER_ID MATCHES "Intel")
+    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -init=snan,arrays")
+  endif()
+endif()
+
 #------------------------------------------------------------------------------
 # Set flag for 32bit dynamics build
 if(32BIT)