travis: Replace CentOS stream 8 with stream 9

CentOS stream 8 reached end of life (EOL) on May 31, 2024. Replace
with CentOS stream 9.

Neither tpm2-tss-devel nor tss2-devel packages exist on CentOS 9.
Differentiate between Fedora and CentOS.

Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>

.travis.yml

@@ -60,7 +60,7 @@ matrix:
           compiler: gcc
 
         - os: linux
-          env: REPO="quay.io/centos/" DISTRO="${REPO}centos:stream8" TSS=tpm2-tss CONTAINER=podman CONTAINER_ARGS="--runtime=/usr/bin/crun --network=host"
+          env: REPO="quay.io/centos/" DISTRO="${REPO}centos:stream9" TSS=tpm2-tss CONTAINER=podman CONTAINER_ARGS="--runtime=/usr/bin/crun --network=host"
           compiler: clang
 
         - os: linux

ci/fedora.sh

@@ -7,12 +7,17 @@ if [ -z "$CC" ]; then
 	exit 1
 fi
 
-case "$TSS" in
-ibmtss) TSS="tss2-devel";;
-tpm2-tss) TSS="tpm2-tss-devel";;
-'') echo "Missing TSS!" >&2; exit 1;;
-*) echo "Unsupported TSS: '$TSS'!" >&2; exit 1;;
-esac
+# Neither tss2-devel nor tpm2-tss-devel exist on CentOS stream 9
+if [ -f /etc/centos-release ]; then
+	TSS="$TSS"
+else
+	case "$TSS" in
+	ibmtss) TSS="tss2-devel";;
+	tpm2-tss) TSS="tpm2-tss-devel";;
+	'') echo "Missing TSS!" >&2; exit 1;;
+	*) echo "Unsupported TSS: '$TSS'!" >&2; exit 1;;
+	esac
+fi
 
 # ibmswtpm2 requires gcc
 [ "$CC" = "gcc" ] || CC="gcc $CC"