Increase lgot buffer for irix gcc builds.

Thanks to Nick Blievers <nickb@adacel.com.au> for the patch.
Bug #192847 r=cls a=dbaron

layout/build/Makefile.in

@@ -167,6 +167,13 @@ DEFINES += -D_IMPL_NS_LAYOUT
 
 GARBAGE += $(BUILD_DATE)
 
+ifeq ($(OS_ARCH),IRIX)
+ifeq ($(GNU_CXX),1)
+LDFLAGS += -Wl,-LD_LAYOUT:lgot_buffer=50
+endif
+endif
+
+
 export:: $(BUILD_DATE)
 
 $(BUILD_DATE): gbdate.pl