IR print visitor: Remove most of the newlines from the printed output

This makes it a lot easier to read... if you have a really wide display.
diff --git a/glsl_parser_extras.cpp b/glsl_parser_extras.cpp
index a028658..d57a68e 100644
--- a/glsl_parser_extras.cpp
+++ b/glsl_parser_extras.cpp
@@ -652,6 +652,7 @@
 	 ir_print_visitor v;
 
 	 ((ir_instruction *)iter.get())->accept(& v);
+	 printf("\n");
       }
    }