tpm2-clear: build only if bootloader/openssl are enabled

The tpm2-clear units are only installed if tpm/bootloader/ssl are
enabled. The tpm2-setup binary/units are built and installed only
if tpm/bootloader/ssl are enabled.
Do the same for the tpm2-clear binary to keep it consistent.

src/tpm2-setup/meson.build

@@ -17,6 +17,8 @@ executables += [
                 'name' : 'systemd-tpm2-clear',
                 'sources' : files('tpm2-clear.c'),
                 'conditions' : [
+                        'ENABLE_BOOTLOADER',
+                        'HAVE_OPENSSL',
                         'HAVE_TPM2',
                 ],
         },