library: refactor all the readproc.h 'PROC_FILL' flags

The 'PROC_FILL' flags, found in readproc.h, had become
almost unmanageable. The hex values were scattered all
over the map as new flags had been introduced. So this
commit resets all of them and will help ensure any new
flags don't duplicate some already existing hex value.

Signed-off-by: Jim Warner <james.warner@comcast.net>

proc/pids.h

@@ -187,8 +187,8 @@ enum pids_fetch_type {
 };
 
 enum pids_select_type {
-    PIDS_SELECT_PID  = 0x1000,
-    PIDS_SELECT_UID  = 0x4000
+    PIDS_SELECT_PID  = 0x10000,
+    PIDS_SELECT_UID  = 0x20000
 };
 
 enum pids_sort_order {