configs: arc64: Enable GDB build

This commit enables the GDB build for the ARC64 target because the
Zephyr GDB 12.1 branch now includes the support for it.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

configs/arc64-zephyr-elf.config

@@ -31,7 +31,9 @@ CT_GCC_SRC_CUSTOM=y
 CT_GCC_CUSTOM_LOCATION="${GITHUB_WORKSPACE}/gcc"
 CT_CC_GCC_EXTRA_CONFIG_ARRAY="--with-gnu-ld --with-gnu-as --enable-initfini-array"
 CT_CC_LANG_CXX=y
-# CT_DEBUG_GDB is not set
+CT_DEBUG_GDB=y
+CT_GDB_SRC_CUSTOM=y
+CT_GDB_CUSTOM_LOCATION="${GITHUB_WORKSPACE}/gdb"
 CT_COMP_LIBS_NEWLIB_NANO=y
 CT_NEWLIB_NANO_SRC_CUSTOM=y
 CT_NEWLIB_NANO_CUSTOM_LOCATION="${GITHUB_WORKSPACE}/newlib"