Add test

The test compiles and links a short program that uses the three kind
arrays.  It is supposed to fail and link time if the symbols are not
provided in the runtime.

Author: mjklemm

flang/test/Runtime/kind_arrays_symbols.f90

@@ -0,0 +1,15 @@
+!RUN: %flang -o %t %s
+
+program kind_array_symbols
+    use iso_fortran_env, only: integer_kinds, real_kinds, logical_kinds
+    implicit none
+
+    integer :: i
+    i = 1
+
+    ! accesses via a variable array index cause code-gen
+    ! to emit used symbols in the object code
+    print *, integer_kinds(i)
+    print *, real_kinds(i)
+    print *, logical_kinds(i)
+end program kind_array_symbols