symbols: don't omit "end" symbols upon mixed code / data aliases

At the example of _sinitext - that symbol has four aliases on x86:
__init_begin, __2M_init_start, __2M_rodata_end, and whatever the first
function in .init.text. With the GNU toolchain all of them are marked
'T' or 't'. With Clang/LLVM, however, some are marked 'r'. Since, to
save space, we want fake "end" symbols only for text, right now
want_symbol_end() has a respective check. That is getting in the way,
however, when the final of those symbols is 'r'. Remove the check and
instead zap the size for anything that is non-code.

Fixes: 6eede548df ('symbols: avoid emitting "end" symbols for data items')
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>

xen/tools/symbols.c

@@ -165,6 +165,10 @@ static int read_symbol(FILE *in, struct sym_entry *s)
 	else if (str[0] == '$')
 		goto skip_tail;
 
+	/* We want fake "end" symbols only for text / code. */
+	if (toupper((uint8_t)stype) != 'T')
+		s->size = 0;
+
 	/* include the type field in the symbol name, so that it gets
 	 * compressed together */
 	s->len = strlen(str) + 1;
@@ -316,7 +320,6 @@ static int compare_name_orig(const void *p1, const void *p2)
 static bool want_symbol_end(unsigned int idx)
 {
 	return table[idx].size &&
-	       toupper(table[idx].type) == 'T' &&
 	       (idx + 1 == table_cnt ||
 	        table[idx].addr + table[idx].size < table[idx + 1].addr);
 }