Coverity: Add GNU path to system path

Coverity tool needs to use GNU compiler. Add GNU path to system path.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I12764c1beaeea6bcba4cdf2e33ef3035b854f41a
diff --git a/tf-m-coverity.yaml b/tf-m-coverity.yaml
index 99b393a..4d94ad6 100644
--- a/tf-m-coverity.yaml
+++ b/tf-m-coverity.yaml
@@ -104,6 +104,9 @@
 
             cd ${WORKSPACE}
 
+            # Add compiler path to sys path
+            export PATH=$GCC_10_3_PATH:${PATH}
+
             # Download TF-M dependencies to avoid git clone in each config
             ${WORKSPACE}/tf-m-ci-scripts/clone.sh