fcm 2014.09.0 make: improve error message if config file missing

[gdcarver]

Compare:

fcm make
[init] make # 2014-10-24T17:24:38Z
[info] FCM 2014.09.0
[init] make config-parse # 2014-10-24T17:24:38Z
[FAIL] make config-parse # 0.0s
[FAIL] make # 0.0s
[FAIL] no configuration specified or found

with:

fcm make -f no.cfg
[init] make # 2014-10-24T17:24:45Z
[info] FCM 2014.09.0
[init] make config-parse # 2014-10-24T17:24:45Z
[FAIL] make config-parse # 0.0s
[FAIL] make # 0.0s
[FAIL] $VAR1 = bless( {
[FAIL] 'ctx' => 'no.cfg',
[FAIL] 'exception' => undef,
[FAIL] 'code' => 'MAKE_CFG_FILE'
[FAIL] }, 'FCM::System::Exception' );
[FAIL] $VAR2 = undef;
[FAIL] $VAR3 = '';