ia64: fix small struct handling (missing complex type entry)

commit 6e8a4460833594d5af1b4539178025da0077df19
added FFI_TYPE_COMPLEX value type (comes after FFI_TYPE_POINTER)

ia64 ffi_closure_unix reiles on the ordering of
types as ia64 has ia64-specific FFI types:
small struct and others.

As a result all tests handling small structs broke.

The change fixes dispatch table by ignoring FFI_TYPE_COMPLEX.
This has positive effect of unbreaking most tests:

                 === libffi Summary ===
 
-# of expected passes            1595
-# of unexpected failures        295
+# of expected passes            1930
+# of unexpected failures        10
 # of unsupported tests          30

Bug: https://bugs.gentoo.org/634190
--- a/src/ia64/unix.S
+++ b/src/ia64/unix.S
@@ -529,6 +529,7 @@ ffi_closure_unix:
 	data8	@pcrel(.Lst_int64)		// FFI_TYPE_SINT64
 	data8	@pcrel(.Lst_void)		// FFI_TYPE_STRUCT
 	data8	@pcrel(.Lst_int64)		// FFI_TYPE_POINTER
+	data8	@pcrel(.Lst_void)		// FFI_TYPE_COMPLEX (not implemented)
 	data8 	@pcrel(.Lst_small_struct)	// FFI_IA64_TYPE_SMALL_STRUCT
 	data8	@pcrel(.Lst_hfa_float)		// FFI_IA64_TYPE_HFA_FLOAT
 	data8	@pcrel(.Lst_hfa_double)		// FFI_IA64_TYPE_HFA_DOUBLE
@@ -550,6 +551,7 @@ ffi_closure_unix:
 	data8	@pcrel(.Lld_int)		// FFI_TYPE_SINT64
 	data8	@pcrel(.Lld_void)		// FFI_TYPE_STRUCT
 	data8	@pcrel(.Lld_int)		// FFI_TYPE_POINTER
+	data8	@pcrel(.Lld_void)		// FFI_TYPE_COMPLEX (not implemented)
 	data8 	@pcrel(.Lld_small_struct)	// FFI_IA64_TYPE_SMALL_STRUCT
 	data8	@pcrel(.Lld_hfa_float)		// FFI_IA64_TYPE_HFA_FLOAT
 	data8	@pcrel(.Lld_hfa_double)		// FFI_IA64_TYPE_HFA_DOUBLE