contrib: Add test for ELF symbol-check

Check both failure cases:
- Use a glibc symbol from a version that is too new
- Use a symbol from a library that is not in the allowlist

And also check a conforming binary.

Adding a similar check for Windows PE can be done in a separate PR.

Makefile.am

@@ -359,4 +359,5 @@ if TARGET_WINDOWS
 endif
 if TARGET_LINUX
 	$(AM_V_at) $(PYTHON) $(top_srcdir)/contrib/devtools/test-security-check.py TestSecurityChecks.test_ELF
+	$(AM_V_at) $(PYTHON) $(top_srcdir)/contrib/devtools/test-symbol-check.py TestSymbolChecks.test_ELF
 endif