test/.gitignore: add missing test targets

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
diff --git a/test/.gitignore b/test/.gitignore
index b69ccab..10ee4ed 100644
--- a/test/.gitignore
+++ b/test/.gitignore
@@ -2,8 +2,10 @@
 clone
 fork
 leaderkill
+mmap_offset_decode
 mtd
 seccomp
+sfd
 sig
 sigkill_rain
 skodic
@@ -11,3 +13,5 @@
 ubi
 vfork
 wait_must_be_interruptible
+x32_lseek
+x32_mmap