boards: sabre-6quad: Add defconfig for libcxx

Summary:
- This commit adds defconfig for libcxx

Impact:
- None

Testing:
- Tested with QEMU

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

boards/arm/imx6/sabre-6quad/configs/libcxx/defconfig

@@ -0,0 +1,68 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="sabre-6quad"
+CONFIG_ARCH_BOARD_SABRE_6QUAD=y
+CONFIG_ARCH_BUTTONS=y
+CONFIG_ARCH_CHIP="imx6"
+CONFIG_ARCH_CHIP_IMX6=y
+CONFIG_ARCH_CHIP_IMX6_6QUAD=y
+CONFIG_ARCH_INTERRUPTSTACK=2048
+CONFIG_ARCH_IRQBUTTONS=y
+CONFIG_ARCH_LOWVECTORS=y
+CONFIG_ARCH_SETJMP_H=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_ARMV7A_ASSOCIATIVITY_16WAY=y
+CONFIG_ARMV7A_L2CC_PL310=y
+CONFIG_ARMV7A_WAYSIZE_64KB=y
+CONFIG_BOARD_LOOPSPERMSEC=99369
+CONFIG_BOOT_RUNFROMSDRAM=y
+CONFIG_BUILTIN=y
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_DEV_ZERO=y
+CONFIG_EXAMPLES_HELLO=y
+CONFIG_EXAMPLES_HELLOXX=y
+CONFIG_EXPERIMENTAL=y
+CONFIG_FS_PROCFS=y
+CONFIG_HAVE_CXX=y
+CONFIG_IMX6_UART1=y
+CONFIG_IMX_DDR_SIZE=1073741824
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INTELHEX_BINARY=y
+CONFIG_LIBCXX=y
+CONFIG_LIBCXXABI=y
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_READLINE=y
+CONFIG_PL310_LOCKDOWN_BY_LINE=y
+CONFIG_PL310_LOCKDOWN_BY_MASTER=y
+CONFIG_PREALLOC_TIMERS=4
+CONFIG_RAM_SIZE=1073741824
+CONFIG_RAM_START=0x10000000
+CONFIG_RAM_VSTART=0x10000000
+CONFIG_RAW_BINARY=y
+CONFIG_READLINE_CMD_HISTORY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_ATEXIT=y
+CONFIG_SCHED_HPWORK=y
+CONFIG_SCHED_HPWORKPRIORITY=192
+CONFIG_SCHED_WAITPID=y
+CONFIG_STACK_COLORATION=y
+CONFIG_START_DAY=2
+CONFIG_START_MONTH=5
+CONFIG_START_YEAR=2022
+CONFIG_SYMTAB_ORDEREDBYNAME=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TESTING_CXXTEST=y
+CONFIG_TESTING_GETPRIME=y
+CONFIG_TESTING_OSTEST=y
+CONFIG_TESTING_OSTEST_FPUTESTDISABLE=y
+CONFIG_UART1_SERIAL_CONSOLE=y