3.15.0-0.4.RC2
    
    - Update to 3.15.0.RC2.
    - Drop upstreamed patches:
      - valgrind-3.15.0-s390x-get-startregs-constraint.patch
      - valgrind-3.15.0-missing-a-c.patch
      - valgrind-3.15.0-libstdc++-supp.patch
      - valgrind-3.15.0-dhat-x86.patch
      - valgrind-3.15.0-gdb-output1.patch
      - valgrind-3.15.0-gdb-output2.patch
    - Update valgrind-3.15.0-mmap-32bit.patch to upstream version.
    - gdb on f30 and rawhide is currently broken, don't run_full_regtest.
    - Any glibc-devel version is.
    - Drop rhel5 special case for tools-devel.
    - Use /bin/true --help as sanity test.