ci: Flush last warning captured

These steps works by printing the last warning when a new is matched, to
support muli-line errors. Resolve last warning not being printed.

Signed-off-by: Jorge Marques <jorge.marques@analog.com>

Author: gastmaier

ci/build.sh

@@ -196,7 +196,6 @@ check_coccicheck() {
 					    --include include/linux/compiler-version.h \
 					    --include include/linux/kconfig.h $file || true)
 
-				found=0
 				msg=
 
 				while read -r row
@@ -470,6 +469,10 @@ compile_kernel() {
 		fi
 	done) ; err=${PIPESTATUS[1]}
 
+	if [[ $found == "1" ]]; then
+		echo $msg >> $tmp_log_file
+	fi
+
 	if [[ $err -ne 0 ]]; then
 		while read -r  line; do
 			echo $line
@@ -541,6 +544,10 @@ compile_kernel_sparse() {
 		fi
 	done) ; err=${PIPESTATUS[1]}
 
+	if [[ $found == "1" ]]; then
+		echo $msg
+	fi
+
 	if [[ $err -ne 0 ]]; then
 		fail=1
 	fi