bootable/recovery: cleanup compiler warnings (potential leak of memory)

bootable/recovery/applypatch/imgdiff.cpp:1065:3: warning: Potential leak of memory pointed to by 'patch_data'
bootable/recovery/applypatch/imgdiff.cpp:1065:3: warning: Potential leak of memory pointed to by 'patch_size'
bootable/recovery/applypatch/imgdiff.cpp:226:7: warning: Potential leak of memory pointed to by 'temp_entries'

Bug: 26936282
Test: WITH_TIDY=1 WITH_STATIC_ANALYZER=1 mm
Change-Id: I3cac945d7677d367934d5619ef7419daf6f48d6f

Author: Rahul Chaudhry

applypatch/imgdiff.cpp

@@ -228,6 +228,7 @@ unsigned char* ReadZip(const char* filename,
   for (i = 0; i < cdcount; ++i) {
     if (!(cd[0] == 0x50 && cd[1] == 0x4b && cd[2] == 0x01 && cd[3] == 0x02)) {
       printf("bad central directory entry %d\n", i);
+      free(temp_entries);
       return NULL;
     }
 
@@ -1077,6 +1078,9 @@ int main(int argc, char** argv) {
     }
   }
 
+  free(patch_data);
+  free(patch_size);
+
   fclose(f);
 
   return 0;