common: some FreeBSD headers are incomplete to avoid namespace pollution

In file included from src/common/x64/cpu_detect.cpp:16:
/usr/include/machine/cpufunc.h:66:17: error: unknown type name 'u_int'
static __inline u_int
                ^
/usr/include/machine/cpufunc.h:67:6: error: unknown type name 'u_int'
bsfl(u_int mask)
     ^
/usr/include/machine/cpufunc.h:69:2: error: unknown type name 'u_int'
        u_int   result;
        ^
/usr/include/machine/cpufunc.h:75:17: error: unknown type name 'u_long'; did you mean 'long'?
static __inline u_long
                ^
/usr/include/machine/cpufunc.h:76:6: error: unknown type name 'u_long'; did you mean 'long'?
bsfq(u_long mask)
     ^
/usr/include/machine/cpufunc.h:78:2: error: use of undeclared identifier 'u_long'; did you mean
      'long'?
        u_long  result;
        ^
[...]

src/common/x64/cpu_detect.cpp

@@ -13,8 +13,10 @@ namespace Common {
 #ifndef _MSC_VER
 
 #ifdef __FreeBSD__
-#include <machine/cpufunc.h>
+// clang-format off
 #include <sys/types.h>
+#include <machine/cpufunc.h>
+// clang-format on
 #endif
 
 static inline void __cpuidex(int info[4], int function_id, int subfunction_id) {