[Pal/Linux-SGX] Implement gramine-sgx-get-token in Rust

.cargo/config.toml

@@ -0,0 +1,6 @@
+# Meson-Cargo integration: create a separate profile to be customized by Scripts/run-cargo.sh
+# is used by Meson. We could instead always use the 'release' profile and then tune that, but
+# the fact that build outputs are in build/target/release might be confusing when the user wants
+# a debug build.
+[profile.meson]
+inherits = "release"

.ci/ubuntu18.04.dockerfile

@@ -45,6 +45,7 @@ RUN apt-get update && env DEBIAN_FRONTEND=noninteractive apt-get install -y \
     ninja-build \
     pkg-config \
     protobuf-c-compiler \
+    protobuf-compiler \
     pylint3 \
     python \
     python3-apport \

.ci/ubuntu20.04.dockerfile

@@ -46,6 +46,7 @@ RUN apt-get update && env DEBIAN_FRONTEND=noninteractive apt-get install -y \
     ninja-build \
     pkg-config \
     protobuf-c-compiler \
+    protobuf-compiler \
     pylint3 \
     python \
     python3-apport \

.gitignore

@@ -1,6 +1,10 @@
 /build
 /install
 
+# Rust build cache (for manual Cargo invokations and rust-analyzer,
+# resides in the builddir when ran through meson)
+/target
+
 # No editor backup files.
 *.sw*
 *.backup