debian: additional compiler/linker flags updated.

debian/nginx-module.rules.in

diff --git a/debian/nginx-module.rules.in b/debian/nginx-module.rules.in
index bbbacfe..1705d5e 100755
--- a/debian/nginx-module.rules.in
+++ b/debian/nginx-module.rules.in
@@ -2,6 +2,7 @@
 
 #export DH_VERBOSE=1
 export DEB_BUILD_MAINT_OPTIONS=hardening=+all,-pie                              
+export DEB_CFLAGS_MAINT_APPEND=-Wp,-D_FORTIFY_SOURCE=2
 DPKG_EXPORT_BUILDFLAGS = 1                                                      
 include /usr/share/dpkg/buildflags.mk
 

debian/nginx.rules.in

diff --git a/debian/nginx.rules.in b/debian/nginx.rules.in
index 1ce0394..e2ef3b4 100755
--- a/debian/nginx.rules.in
+++ b/debian/nginx.rules.in
@@ -2,8 +2,8 @@
 
 #export DH_VERBOSE=1
 export DEB_BUILD_MAINT_OPTIONS=hardening=+all,-pie
-export DEB_CFLAGS_MAINT_APPEND=-fPIC
-export DEB_LDFLAGS_MAINT_APPEND=-pie
+export DEB_CFLAGS_MAINT_APPEND=-Wp,-D_FORTIFY_SOURCE=2 -fPIC
+export DEB_LDFLAGS_MAINT_APPEND=-Wl,--as-needed -pie
 DPKG_EXPORT_BUILDFLAGS = 1
 include /usr/share/dpkg/buildflags.mk