xbyak: Correct xbyak include directory

xbyak is intended to be installed in /usr/local/include/xbyak.
Since we desire not to install xbyak before using it, we copy the headers
to the appropriate directory structure and use that instead
Co-authored-by: merry <git@mary.rs>

externals/CMakeLists.txt

@@ -34,7 +34,9 @@ add_subdirectory(cryptopp)
 # Xbyak
 if (ARCHITECTURE_x86_64)
     add_library(xbyak INTERFACE)
-    target_include_directories(xbyak SYSTEM INTERFACE ./xbyak/xbyak)
+    file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/xbyak/include)
+    file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/xbyak/xbyak DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/xbyak/include)
+    target_include_directories(xbyak SYSTEM INTERFACE ${CMAKE_CURRENT_BINARY_DIR}/xbyak/include)
     target_compile_definitions(xbyak INTERFACE XBYAK_NO_OP_NAMES)
 endif()
 

src/common/x64/xbyak_abi.h

@@ -6,7 +6,7 @@
 
 #include <bitset>
 #include <initializer_list>
-#include <xbyak.h>
+#include <xbyak/xbyak.h>
 #include "common/assert.h"
 
 namespace Common::X64 {

src/common/x64/xbyak_util.h

@@ -5,7 +5,7 @@
 #pragma once
 
 #include <type_traits>
-#include <xbyak.h>
+#include <xbyak/xbyak.h>
 #include "common/x64/xbyak_abi.h"
 
 namespace Common::X64 {

src/video_core/shader/shader_jit_x64_compiler.h

@@ -11,7 +11,7 @@
 #include <utility>
 #include <vector>
 #include <nihstro/shader_bytecode.h>
-#include <xbyak.h>
+#include <xbyak/xbyak.h>
 #include "common/bit_set.h"
 #include "common/common_types.h"
 #include "video_core/shader/shader.h"