fish: Fix build with ndk r18

packages/fish/src-common.h.patch

@@ -0,0 +1,14 @@
+https://reviews.freebsd.org/D14058
+
+diff -u -r ../fish-2.7.1/src/common.h ./src/common.h
+--- ../fish-2.7.1/src/common.h	2017-12-22 16:16:29.000000000 +0000
++++ ./src/common.h	2018-09-21 22:05:33.472645301 +0000
+@@ -658,7 +658,7 @@
+ void append_format(wcstring &str, const wchar_t *format, ...);
+ void append_formatv(wcstring &str, const wchar_t *format, va_list ap);
+ 
+-#ifdef __cpp_lib_make_unique
++#if __cplusplus >= 201402L
+ using std::make_unique;
+ #else
+ /// make_unique implementation