[TestAnonymous] Enable all tests for GCC

Summary:
Also added "_with_dsym" prefix to the dsym tests, and "_with_dwarf" to the dwarf tests.


Test Plan: dotest.py -C gcc -p TestAnonymous

Reviewers: chaoren

Reviewed By: chaoren

Subscribers: lldb-commits

Differential Revision: http://reviews.llvm.org/D8944

llvm-svn: 234624