Simplifies decoder multithread synching

Increment the last_row_mb_col counter by nsync after last MB of row is
ready. This way we dont need to check for last MB of row when
synching.

Set last MB of row ready just after row extension is done, This avoids
o potential race condition whit the processing of last MB of next row.

Change-Id: I19c44fd6041116ee5483be2143b4f4bfcd149eac
diff --git a/.gitignore b/.gitignore
index 110146d..355bd9e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -59,3 +59,6 @@
 /vpx_config.h
 /vpx_version.h
 TAGS
+.cproject
+.project
+.settings