use older known arm image

Cargo.toml

@@ -19,8 +19,8 @@ tor = ["tor-stream"]
 default = ["tls", "tor"]
 
 [profile.release]
-panic = 'abort' 
+panic = 'abort'
-lto = true 
+lto = true
 codegen-units = 1
 opt-level = 'z'  # Optimize for size.
 
@@ -32,6 +32,9 @@ pre-release-replacements = [
 ]
 dev-version-ext = "dev"
 
+[target.armv7-unknown-linux-gnueabihf]
+image = "rustembedded/cross:armv7-unknown-linux-gnueabihf-0.1.16"
+
 [dev-dependencies]
 criterion = "0.3.1"