libnfnetlink: Avoid passing both -fPIC and -fpic

Instead, instruct the configure script to use $(FPIC) only.

Mixing -fPIC and -fpic can cause issues on some platforms like PPC.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
(cherry picked from commit 926157c2ccb02aa06b343662ecbd2571faf6eddd)

package/libs/libnfnetlink/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libnfnetlink
 PKG_VERSION:=1.0.1
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:= \
@@ -40,12 +40,13 @@ define Package/libnfnetlink/description
  and/or management tools in userspace.
 endef
 
-TARGET_CFLAGS += $(FPIC)
-
 CONFIGURE_ARGS += \
 	--enable-static \
 	--enable-shared
 
+CONFIGURE_VARS += \
+	lt_prog_compiler_pic=$(FPIC)
+
 define Build/InstallDev
 	$(INSTALL_DIR) $(1)/usr/include/libnfnetlink
 	$(CP) \