Android o preview 2
syscall_filter: Fix whitespace handling.

Typos of the form "syscallname :1" were triggering compilation
failures. Fix by stripping |syscall_name| before looking up the
syscall.

Bug: 37753889
Test: New unit test.
Change-Id: I653b8f1f9995a5269129ccca330a3ea2e7245722
2 files changed