xenalyze: correct symbol name length fscanf() specifier

SYMBOL_NAME_SIZE is 124, not 128. Use the symbolic name there as well,
to avoid any disconnect.

While there correct indentation on the following line as well.

Coverity ID: 1659391
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Alejandro Vallejo <alejandro.garciavallejo@amd.com>
Acked-by: Anthony PERARD <anthony.perard@vates.tech>
master commit: dfabb3fee3
master date: 2025-07-31 14:44:02 +0200

tools/include/xen-tools/common-macros.h

@@ -88,6 +88,9 @@
     (type *)((char *)mptr__ - offsetof(type, member));  \
 })
 
+#define __STR(...) #__VA_ARGS__
+#define STR(...) __STR(__VA_ARGS__)
+
 #define __AC(X, Y)   (X ## Y)
 #define _AC(X, Y)    __AC(X, Y)