meta-zephyr: Support for ARC toolchain

Added support for ARC toolchains: binutils, gcc, libgcc.
These are not upstreamed, but taken from Symantec ARC repos.

[YOCTO#10659]

Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>

recipes-devtools-arc/binutils/binutils-2.26arc.inc

@@ -0,0 +1,37 @@
+LIC_FILES_CHKSUM="\
+    file://COPYING;md5=59530bdf33659b29e73d4adb9f9f6552\
+    file://COPYING.LIB;md5=9f604d8a4f8e74f4f5140845a21b6674\
+    file://COPYING3;md5=d32239bcb673463ab874e80d47fae504\
+    file://COPYING3.LIB;md5=6a6a8e020838b23406c81b19c1d46df6\
+    file://gas/COPYING;md5=d32239bcb673463ab874e80d47fae504\
+    file://include/COPYING;md5=59530bdf33659b29e73d4adb9f9f6552\
+    file://include/COPYING3;md5=d32239bcb673463ab874e80d47fae504\
+    file://libiberty/COPYING.LIB;md5=a916467b91076e631dd8edb7424769c7\
+    file://bfd/COPYING;md5=d32239bcb673463ab874e80d47fae504\
+    "
+
+def binutils_branch_version(d):
+    pvsplit = d.getVar('PV', True).split('.')
+    return pvsplit[0] + "_" + pvsplit[1]
+
+BINUPV = "${@binutils_branch_version(d)}"
+
+PV = "2.26+gitarc"
+
+#SRCREV = "bcbe0bfce780e426f2e3b78013cb49326ee76824"
+SRCREV="3bfd1155a7f0ff9e10c5ba91f089ae0bb5bfbde1"
+SRC_URI = "\
+     git://github.com/foss-for-synopsys-dwc-arc-processors/binutils-gdb.git;branch=arc-2.26-dev \
+     "
+
+S  = "${WORKDIR}/git"
+
+do_configure_prepend () {
+        rm -rf ${S}/gdb ${S}/libdecnumber ${S}/readline ${S}/sim
+}
+
+CONFIG_SHELL = "/bin/bash"
+
+sysroot_stage_all_append() {
+	sysroot_stage_dir ${D}${exec_prefix}/extlib ${SYSROOT_DESTDIR}${exec_prefix}/extlib
+}

recipes-devtools-arc/binutils/binutils-cross-canadian_2.26arc.bb

@@ -0,0 +1,7 @@
+require recipes-devtools/binutils/binutils.inc
+require recipes-devtools-arc/binutils/binutils-2.26arc.inc
+require recipes-devtools/binutils/binutils-cross-canadian.inc
+
+do_install_append () {
+	rm -f ${D}/${libdir}/../lib/libiberty*
+}

recipes-devtools-arc/binutils/binutils-cross_2.26arc.bb

@@ -0,0 +1,5 @@
+require recipes-devtools/binutils/binutils.inc
+require binutils-2.26arc.inc
+require recipes-devtools/binutils/binutils-cross.inc
+
+#COMPATIBLE_MACHINE = "arc"