samsung: add libril for xmm626x modems

Change-Id: I3064271ac8d563f63b13278944639ab5a29ae87f
samsung: move ril client out of exynos4

Change-Id: I8aa0470652c060a531d2cc7f2d8c68d3c40f5f95
samsung: libril: cleanup debugging code

Change-Id: I1429a892071dbd55d8ffa41b304b1612261f4edc