Use expat-2.1.1 for binary builds

README.android

@@ -43,7 +43,7 @@ aria2c executable was generated using android-ndk-r10d.
 The following libraries were statically linked.
 
 * openssl 1.0.2h
-* expat 2.1.0
+* expat 2.1.1
 * c-ares 1.11.0
 * libssh2 1.7.0
 

README.mingw

@@ -13,7 +13,7 @@ The executable is statically linked, so no extra DLLs are
 necessary. The linked libraries are:
 
 * gmp 6.1.0
-* expat 2.1.0
+* expat 2.1.1
 * sqlite 3.10.2
 * zlib 1.2.8
 * c-ares 1.11.0