Fix bug where roadrunner can't get installed in FreeBSD (#4)

Author: medanthelinium

.gitignore

@@ -1,3 +1,5 @@
 .DS_Store
 *.pyc
 __pycache__
+roles
+*.swp

tasks/setup-FreeBSD.yml

@@ -23,7 +23,7 @@
     cmd: "{{ roadrunner.prefix.bin }}/rr -v | awk -F ' ' '{print $3}'"
 
 - name: Handle roadrunner install/update
-  when: not roadrunner_bin_exists or (roadrunner_version is defined and roadrunner_version.stdout != roadrunner.version)
+  when: not roadrunner_bin_exists.stat.exists or (roadrunner_version.stdout is defined and roadrunner_version.stdout != roadrunner.version)
   block:
     - name: Download the roadrunner v{{ roadrunner.version }} FreeBSD package
       ansible.builtin.get_url: