Non-multiple of 16 width/height support for enc testapp

Also included test sequence.
../h264enc welsenc_arbitrary_res.cfg
Linux shell scripts refactored
Use MSVC inline assembly only on (32-bit) X86

Currently this used the _MSC_VER && !WIN64 to enable the inline
assembly, which still tried to use this code on windows on arm.
Using _MSC_VER && _M_IX86 is enough since _M_IX86 is defined only
when targeting 32 bit x86, not for x64.
Merge pull request #105 from mstorsjo/msvc-disable-inline-asm-on-arm

Use MSVC inline assembly only on (32-bit) X86
Merge pull request #77 from varunbpatil/enc_testapp_arbitrary_res

Non-multiple of 16 width/height support for enc testapp
Merge pull request #83 from varunbpatil/autobuildlinux_cleanup

Linux shell scripts refactored