Add more tests of asin.

This patch adds some randomly-generated tests of asin that are
observed to increase ulps on x86_64.

Tested for x86_64 and x86 and ulps updated accordingly.

	* math/auto-libm-test-in: Add more tests of asin.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.

ChangeLog

@@ -1,5 +1,10 @@
 2015-03-25  Joseph Myers  <joseph@codesourcery.com>
 
+	* math/auto-libm-test-in: Add more tests of asin.
+	* math/auto-libm-test-out: Regenerated.
+	* sysdeps/i386/fpu/libm-test-ulps: Update.
+	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
+
 	[BZ #18138]
 	* sysdeps/unix/sysv/linux/i386/sysdep.h (struct
 	libc_do_syscall_args): New structure.

math/auto-libm-test-in

@@ -128,6 +128,10 @@ asin 0x0.ffffffffffffp0
 asin -0x0.ffffffffffffp0
 asin 0x0.ffffffffffffffffp0
 asin -0x0.ffffffffffffffffp0
+asin -0x2.18915cp-4
+asin -0x3.746774p-4
+asin -0x3.1c54d10e5c844p-4
+asin 0xf.c9675fa6fe69f12p-4
 asin min
 asin -min
 asin min_subnorm