tree-wide: use __ prefixed gcc attributes (#10843)

As suggest here:

https://gcc.gnu.org/onlinedocs/gcc/Attribute-Syntax.html#Attribute-Syntax

    "You may optionally specify attribute names with ‘__’ preceding and
    following the name. This allows you to use them in header files without
    being concerned about a possible macro of the same name. For example,
    you may use the attribute name __noreturn__ instead of noreturn. "

src/basic/sparse-endian.h

@@ -27,8 +27,8 @@
 #include <stdint.h>
 
 #ifdef __CHECKER__
-#define __sd_bitwise __attribute__((bitwise))
-#define __sd_force __attribute__((force))
+#define __sd_bitwise __attribute__((__bitwise__))
+#define __sd_force __attribute__((__force__))
 #else
 #define __sd_bitwise
 #define __sd_force