Bug 318018 [BEOS] Thunderbird static build fails

patch by doug@sheltonfamily.org r=tqh sr=bsmedberg

mail/app/Makefile.in

@@ -147,6 +147,12 @@ RCFLAGS += -DMOZ_STATIC_BUILD
 endif
 endif
 
+ifeq ($(OS_ARCH),BeOS)
+ifdef BUILD_STATIC_LIBS
+OS_LIBS += -ltracker -lgame
+endif
+endif
+
 ifeq ($(OS_ARCH),OS2)
 RESFILE=splashos2.res
 endif