Add HS/700 little/big endian toolchain for shared lib in uClibc

-fPIC should be passed to compiler. No need to pass it to the linker.
-shared should be passed to linker (as it is already).

For this is different from static library and application, adding
toolchains and new compiler/linker is necessary,

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