Move basic variables from rust-bin to rust class

rust-bin.bbclass now only contains what is necessary to build crates
using the rust compiler directly and rust.bbclass contains information
shared between rust-bin and cargo.

Signed-off-by: Tyler Hall <tylerwhall@gmail.com>

classes/rust-bin.bbclass

@@ -1,15 +1,8 @@
 inherit rust
 
-RUSTLIB_DEP ?= " rustlib"
-DEPENDS .= "${RUSTLIB_DEP}"
-RDEPENDS_${PN} .= "${RUSTLIB_DEP}"
+RDEPENDS_${PN} += "${RUSTLIB_DEP}"
 DEPENDS += "patchelf-native"
 
-export rustlibdir = "${libdir}/rust"
-FILES_${PN} += "${rustlibdir}/*.so"
-FILES_${PN}-dev += "${rustlibdir}/*.rlib"
-FILES_${PN}-dbg += "${rustlibdir}/.debug"
-
 RUSTC_ARCHFLAGS += "-C opt-level=3 -g -L ${STAGING_DIR_HOST}/${rustlibdir}"
 EXTRA_OEMAKE += 'RUSTC_ARCHFLAGS="${RUSTC_ARCHFLAGS}"'
 
@@ -37,11 +30,6 @@ OVERLAP_DEPS = "${@get_overlap_deps(d)}"
 RUSTC_PREFER_DYNAMIC = "-C prefer-dynamic"
 RUSTC_FLAGS += "${RUSTC_PREFER_DYNAMIC}"
 
-rustlib_suffix="${TUNE_ARCH}${TARGET_VENDOR}-${TARGET_OS}/rustlib/${HOST_SYS}/lib"
-# Native sysroot standard library path
-rustlib_src="${prefix}/lib/${rustlib_suffix}"
-# Host sysroot standard library path
-rustlib="${libdir}/${rustlib_suffix}"
 CRATE_NAME ?= "${@d.getVar('BPN', True).replace('-rs', '').replace('-', '_')}"
 BINNAME ?= "${BPN}"
 LIBNAME ?= "lib${CRATE_NAME}-rs"