build.sh: explicitly check for bison

We don't work with other yaccs.

diff --git a/build.sh b/build.sh
index 20854b1..57f3d44 100755 (executable)
--- a/build.sh
+++ b/build.sh
@@ -18,7 +18,7 @@ EOF
        done
 }
 
-check_for_application lex yacc autoheader aclocal automake autoconf
+check_for_application lex bison autoheader aclocal automake autoconf
 
 # Actually we don't need the pkg-config executable, but we need the M4 macros.
 # We check for `pkg-config' here and hope that M4 macros will then be