add 2-norm to the tests

Author: perazz

test/linalg/test_linalg_mnorm.fypp

@@ -66,7 +66,7 @@ module test_linalg_mnorm
         type(error_type), allocatable, intent(out) :: error
 
         integer(ilp) :: i,j,k,l,dim1,dim2,dim(2),dim_sizes(2),ptr(${rank}$)
-        character(3), parameter :: orders(*) = ['1  ','fro','inf']
+        character(3), parameter :: orders(*) = ['1  ','2  ','fro','inf']
         integer(ilp), parameter :: ndim = ${rank}$
         integer(ilp), parameter :: n    = 2_ilp**ndim
         integer(ilp), parameter :: dims(*) = [(dim1, dim1=1,ndim)]