arch/um: partially revert the conversion to __section() macro

A couple of um files ended up not including the header file that defines
the __section() macro, and the simplest fix is to just revert the change
for those files.

Fixes: 33def849 treewide: Convert macro and uses of __section(foo) to __section("foo")
Reported-and-tested-by: NGuenter Roeck <linux@roeck-us.net>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/um/kernel/skas/clone.c

@@ -21,7 +21,7 @@
  * on some systems.
  */
 
-void __section(".__syscall_stub")
+void __attribute__ ((__section__ (".__syscall_stub")))
 stub_clone_handler(void)
 {
 	struct stub_data *data = (struct stub_data *) STUB_DATA;

arch/x86/um/stub_segv.c

@@ -8,7 +8,7 @@
 #include <sysdep/mcontext.h>
 #include <sys/ucontext.h>
 
-void __section(".__syscall_stub")
+void __attribute__ ((__section__ (".__syscall_stub")))
 stub_segv_handler(int sig, siginfo_t *info, void *p)
 {
 	ucontext_t *uc = p;