[sw, host] Update Mundane version

This updates the dependency Mundane to version 0.5.0. That version includes
the latest BoringSSL version, which fixes compilation errors with recent
versions of GCC.

Signed-off-by: Luís Marques <luismarques@lowrisc.org>
diff --git a/sw/host/opentitanlib/Cargo.toml b/sw/host/opentitanlib/Cargo.toml
index 959cbb8..01a5347 100644
--- a/sw/host/opentitanlib/Cargo.toml
+++ b/sw/host/opentitanlib/Cargo.toml
@@ -29,7 +29,7 @@
 # In order to not break the current meson-based build system, we'll leave
 # mundane as a dependency.  To regenerate the bazel dependency rules via
 # `cargo raze`, you'll have to temporarily comment out `mundane`.
-mundane = "0.4.4"
+mundane = "0.5.0"
 
 serde = { version="1", features=["serde_derive"] }
 serde_json = "1"
diff --git a/sw/host/rom_ext_image_tools/signer/Cargo.toml b/sw/host/rom_ext_image_tools/signer/Cargo.toml
index 16aec0e..fd7f56a 100644
--- a/sw/host/rom_ext_image_tools/signer/Cargo.toml
+++ b/sw/host/rom_ext_image_tools/signer/Cargo.toml
@@ -31,5 +31,5 @@
 zerocopy = "0.5.0"
 
 [dependencies.mundane]
-version = "0.4.4"
+version = "0.5.0"
 features = ["rsa-pkcs1v15"]