rust: bring back libc as a dependency

Its already pulled in by some of other dependencies so adds zero
extra weight, and provides handy definitions for basic functions
like free().

diff --git a/rust/Cargo.toml.in b/rust/Cargo.toml.in
index a41d2c3fe2dd474a0ed3a102baa127ea23f7660e..b49f11e556ea6920473c7dcb7fe48e50cd202f2a 100644 (file)
--- a/rust/Cargo.toml.in
+++ b/rust/Cargo.toml.in
@@ -37,3 +37,4 @@ ipsec-parser = "0.5"
 snmp-parser = "0.5"
 tls-parser = "0.9"
 x509-parser = "0.6.5"
+libc = "0.2.67"