/cpp/src/tests/sasl_test_setup.sh needs execute permission

Doing a build of Qpid on a clean system (did svn update). I got as far as:

Linking CXX executable resuming_receiver
[ 80%] Built target resuming_receiver
Scanning dependencies of target sasl_config
[ 81%] Generating sasl_config/qpidd.conf, sasl_config/qpidd.sasldb
/bin/sh: 1: ../../../src/tests/sasl_test_setup.sh: Permission denied
make[2]: *** [src/tests/sasl_config/qpidd.conf] Error 126
make[1]: *** [src/tests/CMakeFiles/sasl_config.dir/all] Error 2
make: *** [all] Error 2

Looking at sasl_test_setup.sh it didn't have execute permission, adding
that fixes the build, I'm guessing that this is a subversion metadata
issue on that file?

I've raised https://issues.apache.org/jira/browse/QPID-6244