Adds missing native types to list

The list includes also some that are not listed in the NativeCall
code, but I guess that's OK. Closes #1511

Author: JJ

doc/Language/nativecall.pod6

@@ -65,10 +65,12 @@ likely grow with time).
 
 X<|int8>X<|int16>X<|int32>X<|int64>X<|uint8>X<|uint16>X<|uint32>X<|uint64>X<|long>X<|longlong>X<|ulong>X<|ulonglong>X<|num32>X<|num64>X<|Str>X<|Pointer>X<|bool>X<|size_t>X<|ssize_t>
 =begin table
+    int            (long in C)
     int8           (int8_t in C, also used for char)
     int16          (int16_t in C, also used for short)
     int32          (int32_t in C, also used for int)
     int64          (int64_t in C)
+    uint           (ulong in C)
     uint8          (uint8_t in C, also used for unsigned char)
     uint16         (uint16_t in C, also used for unsigned short)
     uint32         (uint32_t in C, also used for unsigned int)
@@ -77,6 +79,8 @@ X<|int8>X<|int16>X<|int32>X<|int64>X<|uint8>X<|uint16>X<|uint32>X<|uint64>X<|lon
     longlong       (long long in C, at least 64-bit)
     ulong          (unsigned long in C)
     ulonglong      (unsigned long long in C, at least 64-bit)
+    longdouble     (longdouble in C)
+    Num, num       (double in C)
     num32          (float in C)
     num64          (double in C)
     Str            (C string)
@@ -85,6 +89,7 @@ X<|int8>X<|int16>X<|int32>X<|int64>X<|uint8>X<|uint16>X<|uint32>X<|uint64>X<|lon
     bool           (bool from C99)
     size_t         (size_t in C)
     ssize_t        (ssize_t in C)
+    Callable       (callback in C)
 =end table
 
 Don't use Perl 6 native types like C<int> or C<num> in native calls, as they don't have to