Convert encoder config files to unix newlines

The new iOS configuration file welsenc_ios.cfg was committed with
dos newlines originally, while welsenc.cfg was accidentally changed
to dos newlines in f5cd56ea74.
Don't add -DNO_DYNAMIC_VP to ASMFLAGS

None of the assembly source uses this define for anything.
Merge pull request #414 from mstorsjo/unix-newlines

Convert encoder config files to unix newlines
Merge pull request #420 from mstorsjo/simplify-x86-asm-flags

Don't add -DNO_DYNAMIC_VP to ASMFLAGS