Update the stack script for apk handling.

The dlopen of a shared library within an apk is not handled by
the stack tool. Modify to understand and search through the apk to
find the shared library associated with the offset. Then unzip
that shared library to use as the target of addr2line.

Change-Id: I404302f68dff45c35a1dc2a55547f42ea04f02bf

scripts/symbol.py

@@ -185,7 +185,9 @@ def CallAddr2LineForSet(lib, unique_addrs):
 
   symbols = SYMBOLS_DIR + lib
   if not os.path.exists(symbols):
-    return None
+    symbols = lib
+    if not os.path.exists(symbols):
+      return None
 
   cmd = [ToolPath("addr2line"), "--functions", "--inlines",
       "--demangle", "--exe=" + symbols]
@@ -203,7 +205,7 @@ def CallAddr2LineForSet(lib, unique_addrs):
       if symbol == "??":
         symbol = None
       location = child.stdout.readline().strip()
-      if location == "??:0":
+      if location == "??:0" or location == "??:?":
         location = None
       if symbol is None and location is None:
         break
@@ -250,11 +252,9 @@ def CallObjdumpForSet(lib, unique_addrs):
 
   symbols = SYMBOLS_DIR + lib
   if not os.path.exists(symbols):
-    return None
-
-  symbols = SYMBOLS_DIR + lib
-  if not os.path.exists(symbols):
-    return None
+    symbols = lib
+    if not os.path.exists(symbols):
+      return None
 
   addrs = sorted(unique_addrs)
   start_addr_dec = str(StripPC(int(addrs[0], 16)))