[CMAKE] Fix host tools build on x86-64 mingw

Dynamically check for sys/types.h and pid_t in wine config.h
Use TARGET_xxx defines instead of _X86_ as this is undefined by GCC
Add some sense in include directories management by using interface
libraries

sdk/tools/wpp/CMakeLists.txt

@@ -28,7 +28,6 @@ if(CMAKE_CROSSCOMPILING)
         -Dstrtoll=_strtoi64
         -Dopen=_open
         -Dclose=_close)
-
     include_directories(${REACTOS_SOURCE_DIR}/sdk/include/reactos/wine)
 endif()
 
@@ -42,4 +41,5 @@ if(CMAKE_CROSSCOMPILING)
     add_library(wpp ${SOURCE})
 else()
     add_library(wpphost ${SOURCE})
+    target_link_libraries(wpphost PRIVATE host_includes)
 endif()