Move csin, csinh tests to auto-libm-test-in.

Move csin, csinh tests to auto-libm-test-in.

This patch moves most tests of csin and csinh with finite inputs from
libm-test.inc to auto-libm-test-in.  The remaining two tests of each
function with small arguments are not moved because moving them causes
the time required by gen-auto-libm-tests to go up from under 8 seconds
to over 11 minutes for me.  (The current development version of MPC
has had speed improvements for mpc_sin for some time, but there hasn't
been a release containing those improvements yet.)

Tested for x86_64 and x86.

	* math/auto-libm-test-in: Add more tests of csin and csinh.
	* math/auto-libm-test-out: Regenerated.
	* math/libm-test.inc (csin_test_data): Remove tests moved to
	auto-libm-test-in.
	(csinh_test_data): Likewise.