base: syslog: Fix android build
base: syslog: Fix android build

bionic (the android libc) doesn't have shm_open or shm_unlink.

TEST=presubmit
BUG=b:228881485

Change-Id: Ic0df86387a1110835b1e53a68d249fa3d55803ab
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3803896
Reviewed-by: Devin Moore <2d393a6ba36d6d6b29a62220d4bbee029a7bab21@google.com>
Auto-Submit: Frederick Mayle <ea3905c3051aaffd2c0d536be61ebbe5b4659ce0@google.com>
Tested-by: Frederick Mayle <ea3905c3051aaffd2c0d536be61ebbe5b4659ce0@google.com>
Reviewed-by: Dennis Kempin <cd09796fb571bec2782819dbfd33307f65b1c778@google.com>
Commit-Queue: Dennis Kempin <cd09796fb571bec2782819dbfd33307f65b1c778@google.com>

google/crosvm,google/crosvm,google/crosvm,google/crosvm