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

- https://patchwork.kernel.org/patch/1745611/
Handle input event before collecting randomness
Handle input event before collecting randomness

Change-Id: Ic7ebcec4ce5b1afc0452501760035a7211a98d8e
Handle input event before collecting randomness

Change-Id: I1f3a0003c75639b73a30cbc76d8cf393af689fa0
update Bravo defconfig

Change-Id: I86687cd41e644165c52f6a97c8505f41cdd87fe6