Fix gitignore for libmpg123 build artifacts.

Change-Id: I40671a2b9f67c6246c060ad0604456cfc886c757
diff --git a/.gitignore b/.gitignore
index 6352d02..a5d4d64 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,6 +30,9 @@
 Release/
 release/
 
+Debug_SSE_Dll/
+Release_SSE_Dll/
+
 /Makefile
 /config.log
 /config.status
@@ -44,4 +47,4 @@
 /src/libmpg123/mpg123.h
 /src/output/Makefile
 /src/stamp-h1
-/x86-unknown-linux/
\ No newline at end of file
+/x86-unknown-linux/