message: remove obsolete compiler flag
diff: @@ -38,8 +38,8 @@ env:
  - HERMIT_MEM="512M"
  - HERMIT_KVM="0"
  - HERMIT_VERBOSE="1"
  - - CFLAGS_FOR_TARGET="-m64 -mtls-direct-seg-refs -O2 -ftree-vectorize"
  - - GOFLAGS_FOR_TARGET"=-m64 -mtls-direct-seg-refs -O2 -ftree-vectorize"
  - - FCFLAGS_FOR_TARGET"=-m64 -mtls-direct-seg-refs -O2 -ftree-vectorize"
  - - FFLAGS_FOR_TARGET="-m64 -mtls-direct-seg-refs -O2 -ftree-vectorize"
  - - CXXFLAGS_FOR_TARGET="-m64 -mtls-direct-seg-refs -O2 -ftree-vectorize"
  + - CFLAGS_FOR_TARGET="-m64 -O2 -ftree-vectorize"
  + - GOFLAGS_FOR_TARGET"=-m64 -O2 -ftree-vectorize"
  + - FCFLAGS_FOR_TARGET"=-m64 -O2 -ftree-vectorize"
  + - FFLAGS_FOR_TARGET="-m64 -O2 -ftree-vectorize"
  + - CXXFLAGS_FOR_TARGET="-m64 -O2 -ftree-vectorize"
  