um: switch stub_segv_handler to SA_SIGINFO variant, get rid of magic crap in there

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/arch/um/sys-x86/Makefile b/arch/um/sys-x86/Makefile
index 671de0b..81ab348 100644
--- a/arch/um/sys-x86/Makefile
+++ b/arch/um/sys-x86/Makefile
@@ -10,7 +10,7 @@
 
 obj-y = bug.o bugs_$(BITS).o delay_$(BITS).o fault.o ksyms.o ldt.o \
 	ptrace_$(BITS).o ptrace_user.o setjmp_$(BITS).o signal_$(BITS).o \
-	stub_$(BITS).o stub_segv_$(BITS).o syscalls_$(BITS).o \
+	stub_$(BITS).o stub_segv.o syscalls_$(BITS).o \
 	sys_call_table_$(BITS).o sysrq_$(BITS).o tls_$(BITS).o mem_$(BITS).o
 
 ifeq ($(CONFIG_X86_32),y)