Fetch the dependencies we need before trying to build offline

This should fix a build failure when building for OSX in CI.

Author: TheBlueMatt

genbindings.sh

@@ -640,6 +640,9 @@ if [ "$CLANGPP" != "" -a "$LLD" != "" ]; then
 	LINK_ARG_FLAGS="-C link-arg=-fuse-ld=$LLD"
 	export LDK_CLANG_PATH=$(which $CLANG)
 	if [ "$MACOS_SDK" != "" ]; then
+		# First fetch the dependencies we need
+		RUSTC_BOOTSTRAP=1 RUSTFLAGS="$BASE_RUSTFLAGS -C target-cpu=apple-a14" cargo build $CARGO_BUILD_ARGS -v --target aarch64-apple-darwin -Zbuild-std=std,panic_abort || echo "Expected build failure failed successfully"
+
 		# At some point rustc fixed the issue which merits REALLY_PIN_CC. I'm not sure when,
 		# however, so we just use 1.84 as the cutoff.
 		[ "$RUSTC_MINOR_VERSION" -lt 84 ] && REALLY_PIN_CC