Use autocfg 0.1.7 that fixes passing rustc features.

This fixes the build errors with respect to traits and i128.
Delete the Cargo.lock file to have this new version accepted by cargo.

librespot/librespot_0.1.0.bb

@@ -17,6 +17,12 @@ PV_append = ".AUTOINC+551daadc44"
 DEPENDS += "alsa-lib pulseaudio"
 CARGO_BUILD_FLAGS += '--features "pulseaudio-backend"'
 
+# delete the Cargo.lock file so we can override some crates
+do_unpack_extra(){
+    rm ${WORKDIR}/git/Cargo.lock
+}
+addtask unpack_extra after do_unpack before do_patch
+
 # please note if you have entries that do not begin with crate://
 # you must change them to how that package can be fetched
 SRC_URI += " \
@@ -34,7 +40,7 @@ SRC_URI += " \
     crate://crates.io/arc-swap/0.3.11 \
     crate://crates.io/arrayvec/0.4.11 \
     crate://crates.io/atty/0.2.13 \
-    crate://crates.io/autocfg/0.1.5 \
+    crate://crates.io/autocfg/0.1.7 \
     crate://crates.io/backtrace-sys/0.1.31 \
     crate://crates.io/backtrace/0.3.33 \
     crate://crates.io/base64/0.10.1 \