Add parameters for libsoc cross compile steps

-ggdb and -O0 were added to the Cross Compile step
in the libsoc compile_test.c command from Part 2.

Author: David Mandala

Signed-off-by: Robert Wolff <robert.wolff@linaro.org>

Author: Robert Wolff

Extras/CrossCompile/CommandLine.md

@@ -201,7 +201,7 @@ $ cp board_test.c compile_test.c
 
 **Cross compile:**
 
-`$ aarch64-linux-gnu-gcc -I /usr/aarch64-linux-gnu/local/include/ -L /usr/aarch64-linux-gnu/local/lib/ compile_test.c -o compile_test.arm -lsoc`
+`$ aarch64-linux-gnu-gcc -ggdb -O0 -I /usr/aarch64-linux-gnu/local/include/ -L /usr/aarch64-linux-gnu/local/lib/ compile_test.c -o compile_test.arm -lsoc`
 
 **Test:**