Revert accidental bogus change to Makefile.def in last commit.

From-SVN: r79819

Makefile.def

@@ -172,7 +172,7 @@ flags_to_pass = { flag= target_alias ; };
 
 // Build tools
 flags_to_pass = { flag= BISON ; };
-flags_to_pass = { flag= CC_FOR_BUILD ; special_cases=gcc; };
+flags_to_pass = { flag= CC_FOR_BUILD };
 flags_to_pass = { flag= CXX_FOR_BUILD ; };
 flags_to_pass = { flag= EXPECT ; };
 flags_to_pass = { flag= INSTALL ; };