check_python_script: Output all errors before exiting.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>

.github/travis/check_python_script.sh

diff --git a/.github/travis/check_python_script.sh b/.github/travis/check_python_script.sh
index 90ec67a..f86b802 100755
--- a/.github/travis/check_python_script.sh
+++ b/.github/travis/check_python_script.sh
@@ -38,14 +38,14 @@
     for file in $ERROR_FILES_SHEBANG; do
         echo "ERROR: $file does not have the python3 shebang."
     done
-    exit 1
 fi
 
 if [ ! -z "$ERROR_FILES_UTF_CODING" ]; then
     for file in $ERROR_FILES_UTF_CODING; do
         echo "ERROR: $file does not have the utf encoding set."
     done
+fi
+echo
+if [ ! -z "${ERROR_FILES_SHEBANG}${ERROR_FILES_UTF_CODING}" ]; then
     exit 1
 fi
-
-echo