v1.1.1: Bump version, fix CFLAGS in lib/Makefile, rebuild binaries

- Bump APP_VERSION from 1.1.0 to 1.1.1
- Fix CFLAGS in lib/Makefile: remove quoted empty string that broke
  blake3 cross-compilation
- Rebuild Linux and Windows binaries with IVK change detection fix
- Update SHA-256 hashes in release notes

lib/Makefile

@@ -3,7 +3,7 @@ ifeq ($(shell uname),Darwin)
 	CFLAGS := "-mmacosx-version-min=10.11"
 else
     EXT := a
-	CFLAGS := ""
+	CFLAGS :=
 endif
 
 PWD := $(shell pwd)