builtin: move vlib/builtin/overflow/overflow_test.v to vlib/v/tests/builtin_overflow_test.v (reduce time for the common v test vlib/builtin)

Author: spytheman

vlib/builtin/overflow/overflow_test.v renamed to vlib/v/tests/builtin_overflow_test.v

@@ -9,7 +9,7 @@ const vexe = @VEXE
 
 const vroot = os.real_path(@VMODROOT)
 
-const testdata_folder = os.join_path(vroot, 'vlib', 'builtin', 'overflow', 'testdata')
+const testdata_folder = os.join_path(vroot, 'vlib/v/tests/testdata/builtin_overflow')
 
 fn mm(s string) string {
 	return term.colorize(term.magenta, s)

vlib/builtin/overflow/testdata/gen_overflow_tests.vsh renamed to vlib/v/tests/testdata/builtin_overflow/gen_overflow_tests.vsh

@@ -1,6 +1,6 @@
 mut x := i16(-32767)
 println(x)
-x --
+x--
 println(x)
-x --
+x--
 println(x)

vlib/builtin/overflow/testdata/panic_on_i16_add_assign_overflow.out renamed to vlib/v/tests/testdata/builtin_overflow/panic_on_i16_add_assign_overflow.out

@@ -1,6 +1,6 @@
 mut x := i16(32766)
 println(x)
-x ++
+x++
 println(x)
-x ++
+x++
 println(x)