Coverage test: compile plsql with optimize level 1

Oracle dbms_profiler coverage information is only relevant when pl/sql
is compiled with PLSQL_OPTIMIZE_LEVEL=1.

http://docs.oracle.com/database/121/ARPLS/d_profil.htm#ARPLS039
Merge pull request #13 from rsim/compile-test-profiler-with-plsql-optimize-level-1

Coverage test: compile plsql with optimize level 1