If we have strlcat(), we have strlcat(), no need to declare it

The system strlcat() might be some clever built-in or macro thing
anyway, and having a bogus duplicate declaration can cause
problems. And does, in the iOS 7 SDK.

Change-Id: I0aed0ad0f7b96c1c887ed928a2c07fc99bd703f7

curl/UnpackedTarball_curl.mk

@@ -24,6 +24,7 @@ $(eval $(call gb_UnpackedTarball_add_patches,curl,\
 	curl/curl-7.26.0_win.patch \
 	curl/curl-7.26.0_mingw.patch \
 	curl/curl-7.26.0_win-proxy.patch \
+	curl/curl-7.26.0_strlcat.patch \
 ))
 ifeq ($(OS),ANDROID)
 $(eval $(call gb_UnpackedTarball_add_patches,curl,\

curl/curl-7.26.0_strlcat.patch

+--- curl-7.26.0/lib/strequal.h
++++ misc/build/curl-7.26.0/strequal.h
+@@ -30,6 +30,5 @@
+ #ifndef HAVE_STRLCAT
+ #define strlcat(x,y,z) Curl_strlcat(x,y,z)
+ #endif
+-size_t strlcat(char *dst, const char *src, size_t siz);
+ 
+ #endif