headers: Fix include order of fvec.h/ivec.h/dvec.h referring to each other

Previously, these headers expanded properly if dvec.h was included
first, but not if fvec.h or ivec.h were included first.

Move the cyclical includes last, so that the bits that these headers
are expected to declare are declared before the next level header
is included.

Signed-off-by: Martin Storsjö <martin@martin.st>

mingw-w64-headers/crt/fvec.h

diff --git a/mingw-w64-headers/crt/fvec.h b/mingw-w64-headers/crt/fvec.h
index 120ff96..48a343c 100644
--- a/mingw-w64-headers/crt/fvec.h
+++ b/mingw-w64-headers/crt/fvec.h
@@ -13,7 +13,6 @@
 
 #include <intrin.h>
 #include <assert.h>
-#include <ivec.h>
 #include <crtdefs.h>
 
 #if defined(_ENABLE_VEC_DEBUG)
@@ -249,5 +248,8 @@
 
 #endif /* #ifdef __SSE__ */
 #pragma pack(pop)
+
+#include <ivec.h>
+
 #endif
 #endif

mingw-w64-headers/crt/ivec.h

diff --git a/mingw-w64-headers/crt/ivec.h b/mingw-w64-headers/crt/ivec.h
index 7e09ca5..70e8c5f 100644
--- a/mingw-w64-headers/crt/ivec.h
+++ b/mingw-w64-headers/crt/ivec.h
@@ -13,7 +13,6 @@
 
 #include <intrin.h>
 #include <assert.h>
-#include <dvec.h>
 #include <crtdefs.h>
 
 #pragma pack(push,_CRT_PACKING)
@@ -51,6 +50,8 @@
 
 #endif /* ifdef __SSE__ */
 
+#include <dvec.h>
+
 #endif
 #endif