build: Replace 'intrin.h' with 'compiler_intrinsics.h'.

This fixes an error introduced in commit
ba3aa72e.

Change-Id: Ieb7fdbcb3a23454dfeca3b4788890c2306da9d12
Reviewed-by: Philippe Gorley <philippe.gorley@savoirfairelinux.com>

src/Makefile.am

@@ -124,7 +124,7 @@ libring_la_SOURCES = \
 		noncopyable.h \
 		utf8_utils.h \
 		ring_types.h \
-		intrin.h \
+		compiler_intrinsics.h \
 		array_size.h \
 		account_schema.h \
 		registration_states.h \