builtin-math-2.c: Add checks for asin, acos, acosh and atanh.

builtin-math-2.c: Add checks for asin, acos, acosh and atanh.

	* gcc.dg/torture/builtin-math-2.c: Add checks for asin, acos,
	acosh and atanh.

	* gcc.dg/torture/builtin-math-3.c (TESTIT): Append 'F' and 'L'
	floating point modifiers to arguments passed to float and long
	double functions respectively.  Update all callers to use floating
	point numbers, not integers.  Add tests for exp, exp2 and
	exp10/pow10.

From-SVN: r118012