Improve DexFile debugging

Bug: 18105751
Change-Id: I16461b61cb7723ca1f3a52080c377d013d76675b
Allow 1 ulp difference in test_cbrt_D and test_sinh_D.

Bug: 18016320

(cherry picked from commit cf5f86467f5be5f1c3ae2a5518c65f496ac93e33)

Change-Id: I05c3810320d035323e5fec07712b47586eb100bb
(cherry picked from commit 8afb381342e073b3bfcc8700b370e381ac23b2e0)