travis: Add clang-format verions output to travis

Updated `.travis.yml` to output the clang-format version
before running a clang-format check.

Updated `check_code_format.sh` to include a suggestion
to check the user's clang-format version if an error occures.

Change-Id: I4328350cedb27998bd84a3d675eab51c89fb1a9e

diff --git a/scripts/check_code_format.sh b/scripts/check_code_format.sh
index dde4379..216da47 100755 (executable)
--- a/scripts/check_code_format.sh
+++ b/scripts/check_code_format.sh
@@ -22,6 +22,8 @@ RED='\033[0;31m'
 GREEN='\033[0;32m'
 NC='\033[0m' # No Color
 
+clang-format --version
+
 FILES_TO_CHECK=$(git diff --name-only master | grep -v -E "^include/vulkan" | grep -E ".*\.(cpp|cc|c\+\+|cxx|c|h|hpp)$")
 
 if [ -z "${FILES_TO_CHECK}" ]; then
@@ -37,5 +39,7 @@ if [ -z "${FORMAT_DIFF}" ]; then
 else
   echo -e "${RED}Found formatting errors!${NC}"
   echo "${FORMAT_DIFF}"
+  echo "Be sure you are using the following version of clang-format:"
+  clang-format --version
   exit 1
 fi