vold: exFAT support

 * Add support for exFAT using FUSE implementation.
Change-Id: I590c7b1bc8fbcb8c0b2c669f4073ac022857e4da

Author: Ricardo Cerqueira <cyanogenmod@cerqueira.org>
vold: Replace usage of discontinued logwrap()
Change-Id: Ia76bf8998064beee5e0ea4451c4dd8418c2193c4

Change-Id: I590c7b1bc8fbcb8c0b2c669f4073ac022857e4da