packagegroup-core-tools-profile: Remove valgrind for riscv32

valgrind is not yet ported to riscv32.

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit df70bc4c)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>