Merge #13884: depends: Enable bdb unicode support for Windows

5bb0164 depends: Enable unicode support on dbd for Windows (Chun Kuan Lee)

Pull request description:

  define `UNICODE` and `_UNICODE` while compiling for Windows. This would make dbd read filename as utf8 string.

Tree-SHA512: 58ee86ca5333c416c7c4db8266887c085c486cabfbb68c6bd0e66519abb3abfedac6bb7d28e4228eb5c2c4436e4e5060eb7b22490044143b6676d23fc627540a

Author: MarcoFalke

depends/packages/bdb.mk

@@ -10,6 +10,7 @@ $(package)_config_opts=--disable-shared --enable-cxx --disable-replication
 $(package)_config_opts_mingw32=--enable-mingw
 $(package)_config_opts_linux=--with-pic
 $(package)_cxxflags=-std=c++11
+$(package)_cppflags_mingw32=-DUNICODE -D_UNICODE
 endef
 
 define $(package)_preprocess_cmds