Apply "binfmt_elf.c: use get_random_int() to fix entropy depleting"

Patch from https://patchwork.kernel.org/patch/1745611/

Authored-by: Jeff Liu <jeff.liu@oracle.com>
Fix crash when bluetooth is turned off while connecting.

When msm_gpiomux_get() fails, do not attempt to msm_gpiomux_put() on the
failing index.
Reduce logspam.