Prior to this change, native library loading failed for
two reasons:
1. Loading from current working directory instead of the fuzzer's
directory.
2. Using ASAN_OPTIONS=handle_segv=2.
Fix these issues by doing the following.
1. Adding the fuzzer's directory to LD_LIBRARY_PATH instead of "."
2. Specifying handle_segv=1 in ASAN_OPTIONS.
Related: https://github.com/google/oss-fuzz/issues/5178
jonathanmetzman