androidfw: resolve 64-bit build issues

- uid_t/gid_t cast to unsigned long
- unused argument warnings
- tab and space requirements

Change-Id: Ib446d8165b9082be02edb55e6b71fd1a03ea3431
diff --git a/libs/androidfw/ZipUtils.cpp b/libs/androidfw/ZipUtils.cpp
index e9ac2fe..6fa0f14 100644
--- a/libs/androidfw/ZipUtils.cpp
+++ b/libs/androidfw/ZipUtils.cpp
@@ -127,7 +127,7 @@
             goto z_bail;
         }
 
-		/* output buffer holds all, so no need to write the output */
+        /* output buffer holds all, so no need to write the output */
     } while (zerr == Z_OK);
 
     assert(zerr == Z_STREAM_END);       /* other errors should've been caught */
@@ -197,7 +197,7 @@
     {
     }
 
-    long read(unsigned char** nextBuffer, long readSize) {
+    long read(unsigned char** nextBuffer, long /*readSize*/) {
         if (!mBufferReturned) {
             mBufferReturned = true;
             *nextBuffer = mInput;