Fixed Android.mk for Windows.

Missing , in $(call host-cp) merged arguments on windows into broken
path.

cd - does not work on windows, replace with cd $(ROOT_SHADERC_PATH)

Fixed Android.mk for Windows.

Missing , in $(call host-cp) merged arguments on windows into broken
path.

cd - does not work on windows, replace with cd $(ROOT_SHADERC_PATH)

Remove building of glslang_tab.cpp from Android.mk

glslang_tab.cpp is now checked into the glslang repository,
remove the requirement in Android.mk to invoke bison to generate
the file.

The first-ever commit in GitHub.