locale-util: add support for touch emoji

We can use this to highlight when users are supposed to touch their
security tokens.

src/test/test-locale-util.c

@@ -89,7 +89,7 @@ static void test_keymaps(void) {
 
 #define dump_glyph(x) log_info(STRINGIFY(x) ": %s", special_glyph(x))
 static void dump_special_glyphs(void) {
-        assert_cc(SPECIAL_GLYPH_LOCK_AND_KEY + 1 == _SPECIAL_GLYPH_MAX);
+        assert_cc(SPECIAL_GLYPH_TOUCH + 1 == _SPECIAL_GLYPH_MAX);
 
         log_info("/* %s */", __func__);
 
@@ -116,6 +116,7 @@ static void dump_special_glyphs(void) {
         dump_glyph(SPECIAL_GLYPH_UNHAPPY_SMILEY);
         dump_glyph(SPECIAL_GLYPH_DEPRESSED_SMILEY);
         dump_glyph(SPECIAL_GLYPH_LOCK_AND_KEY);
+        dump_glyph(SPECIAL_GLYPH_TOUCH);
 }
 
 int main(int argc, char *argv[]) {