Merge bitcoin#24093: build: specify hosts for qrencode package

bf044ef build: specify hosts for qrencode package (fanquake)

Pull request description:

  Similar to how we specify the OS's we build Qt for, specify which OS's
  we will build qrencode for (a qt dependency). This commit alone doesn't
  change anything, but when we start supporting other OS's, i.e bitcoin#23948,
  where we wont support qt (or at least initially), it'll skip building
  the qrencode package, which would be unused.

  I'll rebase the other *BSD changes on top of this.

ACKs for top commit:
  hebasto:
    ACK bf044ef, I have reviewed the code and it looks OK, I agree it can be merged.

Tree-SHA512: 3f5f11f122704a664dd77d8da0b7e9b95d44b2f1514d0199deed9b8b8ad0d8883a1de1f444b796c5f4681f423a380c3905fce720d7d2b788130162c907c2ce3b

Author: fanquake

depends/Makefile

@@ -131,7 +131,7 @@ build_id_string+=system_clang
 $(host_arch)_$(host_os)_id_string+=system_clang
 endif
 
-qrencode_packages_$(NO_QR) = $(qrencode_packages)
+qrencode_packages_$(NO_QR) = $(qrencode_$(host_os)_packages)
 
 qt_packages_$(NO_QT) = $(qt_packages) $(qt_$(host_os)_packages) $(qt_$(host_arch)_$(host_os)_packages) $(qrencode_packages_)
 

depends/packages/packages.mk

@@ -2,7 +2,10 @@ packages:=boost libevent gmp bls-dash backtrace cmake immer
 
 qt_linux_packages:=qt expat dbus libxcb xcb_proto libXau xproto freetype fontconfig libxkbcommon
 
-qrencode_packages = qrencode
+qrencode_linux_packages = qrencode
+qrencode_android_packages = qrencode
+qrencode_darwin_packages = qrencode
+qrencode_mingw32_packages = qrencode
 
 qt_android_packages=qt
 qt_darwin_packages=qt