libm/Android.bp: clarify "better".

Change-Id: I1b89733e529a4a0d4799b54146559111b29605bb
diff --git a/libm/Android.bp b/libm/Android.bp
index 318d35f..9ef8d55 100644
--- a/libm/Android.bp
+++ b/libm/Android.bp
@@ -183,9 +183,9 @@
         "upstream-freebsd/lib/msun/src/w_drem.c",
         "upstream-freebsd/lib/msun/src/w_dremf.c",
 
-        // The FreeBSD complex functions appear to be better, but they're incomplete.
-        // We take the FreeBSD implementations when they exist, but fill out the rest
-        // of <complex.h> from NetBSD...
+        // The FreeBSD complex function implementations appear to be better
+        // than the other BSDs', but they're incomplete. We take the FreeBSD
+        // implementations when they exist, but fill out the rest from NetBSD...
         "upstream-netbsd/lib/libm/complex/ccoshl.c",
         "upstream-netbsd/lib/libm/complex/ccosl.c",
         "upstream-netbsd/lib/libm/complex/cephes_subrl.c",