Re-added HAVE_FDATASYNC and HAVE_GETHOSTNAME for platforms that have them.

include/build_config/SDL_build_config_android.h

@@ -57,8 +57,10 @@
 #define HAVE_MALLOC 1
 #define HAVE_CALLOC 1
 #define HAVE_REALLOC    1
+#define HAVE_FDATASYNC 1
 #define HAVE_FREE   1
 #define HAVE_GETENV 1
+#define HAVE_GETHOSTNAME 1
 #define HAVE_PUTENV 1
 #define HAVE_SETENV 1
 #define HAVE_UNSETENV   1

include/build_config/SDL_build_config_emscripten.h

@@ -60,8 +60,10 @@
 #define HAVE_MALLOC 1
 #define HAVE_CALLOC 1
 #define HAVE_REALLOC 1
+#define HAVE_FDATASYNC 1
 #define HAVE_FREE 1
 #define HAVE_GETENV 1
+#define HAVE_GETHOSTNAME 1
 #define HAVE_SETENV 1
 #define HAVE_PUTENV 1
 #define HAVE_UNSETENV 1

include/build_config/SDL_build_config_ios.h

@@ -51,6 +51,7 @@
 #define HAVE_REALLOC    1
 #define HAVE_FREE   1
 #define HAVE_GETENV 1
+#define HAVE_GETHOSTNAME 1
 #define HAVE_PUTENV 1
 #define HAVE_SETENV 1
 #define HAVE_UNSETENV   1

include/build_config/SDL_build_config_macos.h

@@ -56,6 +56,7 @@
 #define HAVE_REALLOC    1
 #define HAVE_FREE   1
 #define HAVE_GETENV 1
+#define HAVE_GETHOSTNAME 1
 #define HAVE_SETENV 1
 #define HAVE_PUTENV 1
 #define HAVE_UNSETENV   1