More shared header cleanup.

src/alloy/core.h

@@ -14,7 +14,5 @@
 #include <xenia/logging.h>
 #include <xenia/malloc.h>
 #include <xenia/profiling.h>
-#include <xenia/string.h>
-#include <xenia/types.h>
 
 #endif  // ALLOY_CORE_H_

src/alloy/frontend/ppc/ppc_context.h

@@ -12,6 +12,7 @@
 
 #include <alloy/core.h>
 #include <alloy/vec128.h>
+#include <poly/poly.h>
 
 namespace alloy { namespace runtime {
   class Runtime;
@@ -37,7 +38,7 @@ using vec128_t = alloy::vec128_t;
 // 128-256: VR
 
 #pragma pack(push, 4)
-typedef struct XECACHEALIGN64 PPCContext_s {
+typedef struct alignas(64) PPCContext_s {
   // Must be stored at 0x0 for now.
   // TODO(benvanik): find a nice way to describe this to the JIT.
   runtime::ThreadState* thread_state;

src/alloy/vec128.h

@@ -11,10 +11,11 @@
 #define ALLOY_VEC128_H_
 
 #include <alloy/core.h>
+#include <poly/poly.h>
 
 namespace alloy {
 
-typedef struct XECACHEALIGN vec128_s {
+typedef struct alignas(16) vec128_s {
   union {
     struct {
       float x;