Wrap deleteDir() in try/catch (#93)

This sometimes fails, causing the entire build step to fail. This
should hopefully provide more information as to why its failing,
as well as also allow the build to succeed.

Jenkinsfile

@@ -185,7 +185,11 @@ pipeline {
               } finally {
                   library("tailor-meta@${params.tailor_meta}")
                   cleanDocker()
-                  deleteDir()
+                  try {
+                    deleteDir()
+                  } catch (e) {
+                    println e
+                  }
               }
             }}]
           }
@@ -234,7 +238,11 @@ pipeline {
                   artifacts: "$debian_dir/rules*, $debian_dir/control*, $debian_dir/Dockerfile*", allowEmptyArchive: true)
                 library("tailor-meta@${params.tailor_meta}")
                 cleanDocker()
-                deleteDir()
+                try {
+                  deleteDir()
+                } catch (e) {
+                  println e
+                }
               }
             }}]
           }
@@ -255,7 +263,7 @@ pipeline {
                   docker.withRegistry(params.docker_registry, docker_credentials) { bundle_image.pull() }
                 }
                 bundle_image.inside("-v $HOME/tailor/ccache:/ccache -e CCACHE_DIR=/ccache") {
-                  // Invoke the Jenkins Job Cacher Plugin via the cache method. 
+                  // Invoke the Jenkins Job Cacher Plugin via the cache method.
                   // Set the max cache size to 4GB, as S3 only allows a 5GB max upload at once
                   cache(maxCacheSize: 4000, caches: [
                     arbitraryFileCache(path: '${HOME}/tailor/ccache', cacheName: recipe_label)
@@ -275,7 +283,11 @@ pipeline {
                 // archiveArtifacts(artifacts: "*.deb", allowEmptyArchive: true)
                 library("tailor-meta@${params.tailor_meta}")
                 cleanDocker()
-                deleteDir()
+                try {
+                  deleteDir()
+                } catch (e) {
+                  println e
+                }
               }
             }}]
           }
@@ -313,7 +325,11 @@ pipeline {
               } finally {
                 library("tailor-meta@${params.tailor_meta}")
                 cleanDocker()
-                deleteDir()
+                try {
+                  deleteDir()
+                } catch (e) {
+                  println e
+                }
               }
             }}]
           }