[ccache] -fdiagnostics-color problem

[Steven Honeyman]

I also get a build problem with -fdiagnostics-color enabled. With
gcc4.9.2 in `make test` I get:


test/main
test/test_argument_processing.c:199: Failed assertion:
  Suite:      argument_processing
  Test:       MQ_flag_without_immediate_argument_should_not_add_MQobj
  Expression: act_cpp
  Expected:   gcc -MD -MP -MFfoo.d -MQ foo.d
  Actual:     gcc -fdiagnostics-color -MD -MP -MFfoo.d -MQ foo.d

test/test_argument_processing.c:216: Failed assertion:
  Suite:      argument_processing
  Test:       MT_flag_without_immediate_argument_should_not_add_MTobj
  Expression: act_cpp
  Expected:   gcc -MD -MP -MFfoo.d -MT foo.d
  Actual:     gcc -fdiagnostics-color -MD -MP -MFfoo.d -MT foo.d

test/test_argument_processing.c:233: Failed assertion:
  Suite:      argument_processing
  Test:       MQ_flag_with_immediate_argument_should_not_add_MQobj
  Expression: act_cpp
  Expected:   gcc -MD -MP -MFfoo.d -MQfoo.d
  Actual:     gcc -fdiagnostics-color -MD -MP -MFfoo.d -MQfoo.d

test/test_argument_processing.c:250: Failed assertion:
  Suite:      argument_processing
  Test:       MT_flag_with_immediate_argument_should_not_add_MQobj
  Expression: act_cpp
  Expected:   gcc -MD -MP -MFfoo.d -MTfoo.d
  Actual:     gcc -fdiagnostics-color -MD -MP -MFfoo.d -MTfoo.d

test/test_argument_processing.c:275: Failed assertion:
  Suite:      argument_processing
  Test:       fprofile_flag_with_existing_dir_should_be_rewritten_to_real_path
  Expression: act_cpp
  Expected:   gcc
-fprofile-generate=/tmp/makepkg/ccache-git/src/ccache/testdir.20931/argument_processing/fprofile_flag_with_existing_dir_should_be_rewritten_to_real_path/some/dir
  Actual:     gcc
-fprofile-generate=/tmp/makepkg/ccache-git/src/ccache/testdir.20931/argument_processing/fprofile_flag_with_existing_dir_should_be_rewritten_to_real_path/some/dir
-fdiagnostics-color

test/test_argument_processing.c:294: Failed assertion:
  Suite:      argument_processing
  Test:       fprofile_flag_with_nonexisting_dir_not_be_rewritten
  Expression: act_cpp
  Expected:   gcc -fprofile-generate=some/dir
  Actual:     gcc -fprofile-generate=some/dir -fdiagnostics-color

FAILED: 6 tests