Revert "Update to FreeBSD libm r336523."

This reverts commit f86ee10278116d211cfb08679416444e0e714cb5.

Incorrect result for fmodf(3.0f, 0f) = 1.0f breaks ART tests.

Bug: 111710419
Test: art/test/testrunner/testrunner.py -b -t 436-rem-float --target
Change-Id: I7eae68fb92740db33415d16418447bcbbd98ecba
diff --git a/libm/upstream-freebsd/lib/msun/src/s_csinhf.c b/libm/upstream-freebsd/lib/msun/src/s_csinhf.c
index 6e29f19..7f58b55 100644
--- a/libm/upstream-freebsd/lib/msun/src/s_csinhf.c
+++ b/libm/upstream-freebsd/lib/msun/src/s_csinhf.c
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD: head/lib/msun/src/s_csinhf.c 336362 2018-07-17 07:42:14Z bde $");
+__FBSDID("$FreeBSD: head/lib/msun/src/s_csinhf.c 326219 2017-11-26 02:00:33Z pfg $");
 
 #include <complex.h>
 #include <math.h>
@@ -92,8 +92,7 @@
 		return (CMPLXF(x * cosf(y), INFINITY * sinf(y)));
 	}
 
-	return (CMPLXF(((long double)x + x) * (y - y),
-	    ((long double)x * x) * (y - y)));
+	return (CMPLXF((x + x) * (y - y), (x * x) * (y - y)));
 }
 
 float complex