Add ARC700 UcLibc for Big endian on Linux

01:20:46 **** Build of configuration Debug for project 77 ****
make all
Building file: ../src/77.c
Invoking: ARC Linux UcLibc GCC C Compiler
arceb-buildroot-linux-uclibc-gcc -O0 -Wall -Wa,-adhlns="src/77.o.lst" -c -fmessage-length=0 -MMD -MP -MF"src/77.d" -MT"src/77.d" -mA7 -mbig-endian -g3 -gdwarf-2 -mbarrel-shifter -o "src/77.o" "../src/77.c"
Finished building: ../src/77.c

Building file: ../src/crt0.S
Invoking: ARC Linux UcLibc GCC Assembler
arceb-buildroot-linux-uclibc-gcc -x assembler-with-cpp -Wall -Wa,-adhlns="src/crt0.o.lst" -c -fmessage-length=0 -MMD -MP -MF"src/crt0.d" -MT"src/crt0.d" -mA7 -mbig-endian -g3 -gdwarf-2 -mbarrel-shifter -o "src/crt0.o" "../src/crt0.S"
Finished building: ../src/crt0.S

Building target: 77.elf
Invoking: ARC Linux UcLibc GCC C Linker
arceb-buildroot-linux-uclibc-gcc -T"/home/yunluz/runtime-EclipseApplication/77/lds/arcelf.lds" -nostartfiles -Wl,-Map,77.map -mA7 -mbig-endian -g3 -gdwarf-2 -mbarrel-shifter -o "77.elf"  ./src/77.o ./src/crt0.o
Finished building target: 77.elf

Invoking: ARC Linux UcLibc  Print Size
arceb-buildroot-linux-uclibc-size  --format=berkeley 77.elf
   text	   data	    bss	    dec	    hex	filename
   1269	    116	  18436	  19821	   4d6d	77.elf
Finished building: 77.siz

01:20:46 Build Finished (took 218ms)

Signed-off-by: Yunlu Zhang <Yunlu.Zhang@synopsys.com>