Update libssh2-sys's build script

The builds on the linux bots are currently broken because the recent
modifications to this build script forgot to set up PKG_CONFIG_PATH for custom
installations of OpenSSL

diff --git a/Cargo.lock b/Cargo.lock
index ecfb4ccb97605195dfacfabbb3ff7940d11a3438..fe95feb53c99c0fb4021d514be860a9bdbb2d01a 100644 (file)
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -201,7 +201,7 @@ version = "0.2.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "libssh2-sys 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libssh2-sys 0.1.30 (registry+https://github.com/rust-lang/crates.io-index)",
  "libz-sys 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "openssl-sys 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -217,7 +217,7 @@ dependencies = [
 
 [[package]]
 name = "libssh2-sys"
-version = "0.1.29"
+version = "0.1.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cmake 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",