Build the cross gcc for the secondary arch as such

Pass --enable-hybrid-secondary to gcc's configure when building it as
a secondary compiler. Doesn't make a difference for building Haiku
itself, but makes it easier to match the Haiku cross devel package with
the compiler when building bootstrap packages with haikuporter.

gcc 4 only ATM.

build/scripts/build_cross_tools_gcc4

@@ -135,6 +135,10 @@ if [ "$HAIKU_USE_GCC_GRAPHITE" = 1 ]; then
 		--with-host-libstdcxx=\"-lstdc++\""
 fi
 
+if [ -n "$SECONDARY_ARCH" ]; then
+	gccConfigureArgs="$gccConfigureArgs --enable-hybrid-secondary"
+fi
+
 # force the POSIX locale, as the build (makeinfo) might choke otherwise
 export LC_ALL=POSIX