Use normal toolchain with cbindgen (#57)

* Use normal toolchain with cbindgen.
* Turn off macro expansion for telemetry ffi cbindgen

These changes allow us to make a release without changing our build infrastructure.

Author: paullegranddc

build-profiling-ffi.sh

@@ -148,13 +148,13 @@ echo "Building tools"
 cargo build --package tools --bins
 
 echo "Generating $destdir/include/libdatadog headers..."
-rustup run nightly -- cbindgen --crate ddcommon-ffi \
+cbindgen --crate ddcommon-ffi \
     --config ddcommon-ffi/cbindgen.toml \
     --output "$destdir/include/datadog/common.h"
-rustup run nightly -- cbindgen --crate "${datadog_profiling_ffi}" \
+cbindgen --crate "${datadog_profiling_ffi}" \
     --config profiling-ffi/cbindgen.toml \
     --output "$destdir/include/datadog/profiling.h"
-rustup run nightly -- cbindgen --crate ddtelemetry-ffi \
+cbindgen --crate ddtelemetry-ffi \
     --config ddtelemetry-ffi/cbindgen.toml \
     --output "$destdir/include/datadog/telemetry.h"
 ./target/debug/dedup_headers "$destdir/include/datadog/common.h" "$destdir/include/datadog/telemetry.h" "$destdir/include/datadog/profiling.h"

ddtelemetry-ffi/cbindgen.toml

@@ -27,6 +27,6 @@ rename_variants = "ScreamingSnakeCase"
 must_use = "DDOG_CHECK_RETURN"
 
 [parse]
-expand = ["ddtelemetry-ffi"]
+# expand = ["ddtelemetry-ffi"]
 parse_deps = true
 include = ["ddcommon", "ddtelemetry", "ddcommon-ffi"]