[PATCH v2 3/5] sha1dc_git.h: re-arrange an ifdef chain for a subsequent change

A subsequent change will change the semantics of DC_SHA1_SUBMODULE in
a way that would require moving these checks around, so start by
moving them around without any functional changes to reduce the size
of the subsequent patch.

Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
---
 sha1dc_git.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sha1dc_git.h b/sha1dc_git.h
index a8c2729278..41e1c3fd3f 100644
--- a/sha1dc_git.h
+++ b/sha1dc_git.h

@@ -1,9 +1,9 @@
 /* Plumbing with collition-detecting SHA1 code */
 
-#ifdef DC_SHA1_SUBMODULE
-#include "sha1collisiondetection/lib/sha1.h"
-#elif defined(DC_SHA1_EXTERNAL)
+#ifdef DC_SHA1_EXTERNAL
 #include <sha1dc/sha1.h>
+#elif defined(DC_SHA1_SUBMODULE)
+#include "sha1collisiondetection/lib/sha1.h"
 #else
 #include "sha1dc/sha1.h"
 #endif

-- 
2.15.1.424.g9478a66081