log extra info for debugging

Make recovery log its PID, and when we use a block map file, log how
many ranges it contains.

Change-Id: I1b4299f8163af68a770b48c029ae25e6cb45d26b

minzip/SysUtil.c

@@ -153,6 +153,8 @@ static int sysMapBlockFile(FILE* mapf, MemMapping* pMap)
     pMap->addr = reserve;
     pMap->length = size;
 
+    LOGI("mmapped %d ranges\n", range_count);
+
     return 0;
 }
 

recovery.cpp

@@ -938,7 +938,7 @@ main(int argc, char **argv) {
         return 0;
     }
 
-    printf("Starting recovery on %s", ctime(&start));
+    printf("Starting recovery (pid %d) on %s", getpid(), ctime(&start));
 
     load_volume_table();
     ensure_path_mounted(LAST_LOG_FILE);