security/tpm2-tools: fix build on GCC architectures

Use C11 compiler:
tools/tpm2_tool.c:92: error: 'tpm2_option_flags' has no member named 'verbose'
tools/tpm2_tool.c:103: error: 'tpm2_option_flags' has no member named 'quiet'
tools/tpm2_tool.c:116: error: 'tpm2_option_flags' has no member named 'enable_errata'