dos2unix.bbclass: Move to oe-core

- Import from meta-oe layer

- This is useful for many packages where CR-LF
  needs to be adjusted, many recipes depend on it
  e.g. meta-multimedia libebml and so on.

(From OE-Core rev: bd4a02d8d3cfb476a2da0f4616605c92604266c0)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/dos2unix.bbclass

@@ -0,0 +1,14 @@
+# Class for use to convert all CRLF line terminators to LF
+# provided that some projects are being developed/maintained
+# on Windows so they have different line terminators(CRLF) vs
+# on Linux(LF), which can cause annoying patching errors during
+# git push/checkout processes.
+
+do_convert_crlf_to_lf[depends] += "dos2unix-native:do_populate_sysroot"
+
+# Convert CRLF line terminators to LF
+do_convert_crlf_to_lf () {
+	find ${S} -type f -exec dos2unix {} \;
+}
+
+addtask convert_crlf_to_lf after do_unpack before do_patch