Add a test that checks if debug information is disabled by default

In a recent change to clang 17.0.0, debug information got enabled by
default by mistake.
Add a test that helps to prevent that.

rhbz_2239619/main.fmf

@@ -0,0 +1,25 @@
+summary: Test if debug information is disabled by default
+test: "$WITH_SCL ./runtest.sh"
+require: []
+framework: shell
+tier: 1
+component:
+  - llvm-toolset
+  - clang
+
+adjust:
+  # Common requirements when LLVM is not SCL-ized
+  - require+:
+      - clang
+    when: "collection is not defined"
+
+  # Requirements for SCL-ized LLVM
+  - require+:
+      - llvm-toolset-13.0-clang
+    when: "collection == llvm-toolset-13.0"
+  - require+:
+      - llvm-toolset-14.0-clang
+    when: "collection == llvm-toolset-14.0"
+  - require+:
+      - llvm-toolset-15.0-clang
+    when: "collection == llvm-toolset-15.0"

rhbz_2239619/runtest.sh

@@ -0,0 +1,9 @@
+#!/bin/sh -eux
+
+# Ensure that compiled code does not have debug information enabled by
+# default.
+
+if clang -S test.c -o - | grep "\.section[[:space:]]\+\.debug_info"; then
+    echo "Error: debug information is enabled by default!" >&2
+    exit 1
+fi

rhbz_2239619/test.c

@@ -0,0 +1,3 @@
+int main(){
+	return 0;
+}