libre: fix ld argument

When using the default Build/Compile routine $LD is set to the actual
linker, so libre's build system is not using ld indirectly via the
compiler anymore. But it feeds -rdynamic to ld instead of
--export-dynamic. Fix that with this patch.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

libs/re/patches/003-fix-linker-call.patch

@@ -0,0 +1,11 @@
+--- a/mk/re.mk
++++ b/mk/re.mk
+@@ -235,7 +235,7 @@ ifeq ($(OS),linux)
+ 	LFLAGS		+= -fPIC
+ 	SH_LFLAGS	+= -shared
+ 	MOD_LFLAGS	+=
+-	APP_LFLAGS	+= -rdynamic
++	APP_LFLAGS	+= --export-dynamic
+ 	AR		:= ar
+ 	AFLAGS		:= crD
+ endif