Update to FreeBSD libm r336523.

This includes an ld128 powl, plus the clog* and cpow* families.

Also teach the NOTICE generator to strip SPDX-License-Identifier lines.

Bug: N/A
Test: ran tests
Change-Id: Ic8289d1253666a19468a4088884cf7540f1ec66d
diff --git a/libm/upstream-freebsd/lib/msun/src/e_remainder.c b/libm/upstream-freebsd/lib/msun/src/e_remainder.c
index 9be513b..a4d277f 100644
--- a/libm/upstream-freebsd/lib/msun/src/e_remainder.c
+++ b/libm/upstream-freebsd/lib/msun/src/e_remainder.c
@@ -12,7 +12,7 @@
  */
 
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
+__FBSDID("$FreeBSD: head/lib/msun/src/e_remainder.c 336362 2018-07-17 07:42:14Z bde $");
 
 /* __ieee754_remainder(x,p)
  * Return :                  
@@ -45,11 +45,11 @@
 	hx &= 0x7fffffff;
 
     /* purge off exception values */
-	if((hp|lp)==0) return (x*p)/(x*p); 	/* p = 0 */
-	if((hx>=0x7ff00000)||			/* x not finite */
+	if(((hp|lp)==0)||		 	/* p = 0 */
+	  (hx>=0x7ff00000)||			/* x not finite */
 	  ((hp>=0x7ff00000)&&			/* p is NaN */
 	  (((hp-0x7ff00000)|lp)!=0)))
-	    return ((long double)x*p)/((long double)x*p);
+	    return nan_mix(x, p)/nan_mix(x, p);
 
 
 	if (hp<=0x7fdfffff) x = __ieee754_fmod(x,p+p);	/* now x < 2p */