mtools: fix build errors on mac os x (#19064)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 44512

tools/mtools/patches/100-compile_fix.patch

@@ -0,0 +1,19 @@
+--- a/sysincludes.h
++++ b/sysincludes.h
+@@ -101,14 +101,8 @@ typedef void *caddr_t;
+ #if defined __GNUC__ && defined __STDC__
+ /* gcc -traditional doesn't have PACKED, UNUSED and NORETURN */
+ # define PACKED __attribute__ ((packed))
+-# if __GNUC__ == 2 && __GNUC_MINOR__ > 6 || __GNUC__ >= 3
+-/* gcc 2.6.3 doesn't have "unused" */		/* mool */
+-#  define UNUSED(x) x __attribute__ ((unused));x
+-#  define UNUSEDP __attribute__ ((unused))
+-# else
+-#  define UNUSED(x) x
+-#  define UNUSEDP /* */
+-# endif
++# define UNUSED(x) x
++# define UNUSEDP /* */
+ # define NORETURN __attribute__ ((noreturn))
+ #else
+ # define UNUSED(x) x