Move picochip directory to correct location.

gcc/config/picochip/constraints.md

gcc/config/picochip/dfa_space.md

gcc/config/picochip/dfa_speed.md

gcc/config/picochip/libgccExtras/adddi3.asm

gcc/config/picochip/libgccExtras/ashlsi3.asm

gcc/config/picochip/libgccExtras/ashlsi3.c

gcc/config/picochip/libgccExtras/ashrsi3.asm

gcc/config/picochip/libgccExtras/ashrsi3.c

gcc/config/picochip/libgccExtras/clzsi2.asm

gcc/config/picochip/libgccExtras/cmpsi2.asm

gcc/config/picochip/libgccExtras/divmod15.asm

gcc/config/picochip/libgccExtras/divmodhi4.asm

gcc/config/picochip/libgccExtras/divmodsi4.asm

gcc/config/picochip/libgccExtras/fake_libgcc.asm

gcc/config/picochip/libgccExtras/longjmp.asm

gcc/config/picochip/libgccExtras/lshrsi3.asm

gcc/config/picochip/libgccExtras/lshrsi3.c

gcc/config/picochip/libgccExtras/parityhi2.asm

gcc/config/picochip/libgccExtras/popcounthi2.asm

gcc/config/picochip/libgccExtras/setjmp.asm