nginx: add patch to fix compilation error on mips targets

Add patch to fix compilation error on mips targets. This was triggered
after enabling LTO. It was discovered that -fPIC is enabled on building
dynamic modules in CFLAGS but was missing on linking them. This patch
adds the missing -fPIC also on linking.

Fixes: 3b13b08ad9 ("nginx: Fix compilation with LTO")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

net/nginx/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=nginx
 PKG_VERSION:=1.25.4
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=nginx-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://nginx.org/download/

net/nginx/patches/nginx/202-fix-fPIC-on-link.patch

@@ -0,0 +1,11 @@
+--- a/auto/make
++++ b/auto/make
+@@ -623,7 +623,7 @@ END
+ modules:	$ngx_obj
+ 
+ $ngx_obj:	$ngx_deps$ngx_spacer
+-	\$(LINK) $ngx_long_start$ngx_binout$ngx_obj$ngx_long_cont$ngx_objs$ngx_libs$ngx_link$ngx_module_link
++	\$(LINK) $ngx_pic_opt $ngx_long_start$ngx_binout$ngx_obj$ngx_long_cont$ngx_objs$ngx_libs$ngx_link$ngx_module_link
+ $ngx_long_end
+ 
+ $ngx_modules_obj:	\$(CORE_DEPS)$ngx_cont$ngx_modules_c