Upgrade proc-macro2 to 1.0.56 am: c355513437

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/proc-macro2/+/2520717

Change-Id: Ieb6d112f3633e9b565e55497c1e62a95227087c4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/build.rs b/build.rs
index 59505a5..3ee8a9f 100644
--- a/build.rs
+++ b/build.rs
@@ -72,6 +72,10 @@ fn main() {
         println!("cargo:rustc-cfg=no_libprocmacro_unwind_safe");
     }
 
+    if version.minor < 34 {
+        println!("cargo:rustc-cfg=no_try_from");
+    }
+
     if version.minor < 39 {
         println!("cargo:rustc-cfg=no_bind_by_move_pattern_guard");
     }