testsuite: Rename test to avoid typo in its name [PR95862]

2020-11-25  Jakub Jelinek  <jakub@redhat.com>

	PR rtl-optimization/95862
	* gcc.dg/builtin-artih-overflow-5.c: Renamed to ...
	* gcc.dg/builtin-arith-overflow-5.c: ... this.

diff --git a/gcc/testsuite/gcc.dg/builtin-artih-overflow-5.c b/gcc/testsuite/gcc.dg/builtin-arith-overflow-5.c
similarity index 100%
rename from gcc/testsuite/gcc.dg/builtin-artih-overflow-5.c
rename to gcc/testsuite/gcc.dg/builtin-arith-overflow-5.c