Building using Makefile on platforms without SSE support #284

| Operating System & Version | armbian |
| Kernel Version (Linux Only) | 3.10.102-odroidxu4 |
| Build System | Makefile |

When trying to build the libary using make it's failing with the following error. Im using gcc version 4.9.2

g++ src/image.cpp -std=c++11 -fPIC -pedantic -Ofast -Wno-missing-field-initializ ers -Wno-switch -Wno-multichar -DRS_USE_V4L2_BACKEND pkg-config --cflags --libs libusb-1.0 -mfpu=neon -mfloat-abi=hard -ftree-vectorize -c -o obj/image.o
src/image.cpp: In function ‘void rsimpl::unpack_rw10_from_rw8(rsimpl::byte* cons t_, const byte_, int)’:
src/image.cpp:75:43: error: ISO C++ forbids declaration of ‘type name’ with no t ype [-fpermissive]
auto src = reinterpret_cast<const __m128i *>(s);
^
src/image.cpp:75:43: error: expected ‘>’ before ‘__m128i’
src/image.cpp:75:43: error: expected ‘(’ before ‘__m128i’
src/image.cpp:75:43: error: ‘__m128i’ was not declared in this scope
src/image.cpp:75:52: error: expected primary-expression before ‘>’ token
auto src = reinterpret_cast<const __m128i *>(s);
^
src/image.cpp:75:56: error: expected ‘)’ before ‘;’ token
auto src = reinterpret_cast<const __m128i *>(s);
^
src/image.cpp:76:37: error: ‘__m128i’ does not name a type
auto dst = reinterpret_cast<__m128i >(d[0]);
^
src/image.cpp:76:45: error: expected ‘>’ before ‘’ token
auto dst = reinterpret_cast<__m128i >(d[0]);
^
src/image.cpp:76:45: error: expected ‘(’ before ‘’ token
src/image.cpp:76:46: error: expected primary-expression before ‘>’ token
auto dst = reinterpret_cast<__m128i _>(d[0]);
^
src/image.cpp:76:53: error: expected ‘)’ before ‘;’ token
auto dst = reinterpret_cast<__m128i *>(d[0]);
^
src/image.cpp:78:18: error: ‘xin’ was not declared in this scope
_m128i xin = (_m128i)src;
^
src/image.cpp:78:33: error: expected primary-expression before ‘)’ token
_m128i xin = (_m128i)src;
^
src/image.cpp:79:18: error: ‘xout’ was not declared in this scope
_m128i xout = (_m128i) dst;
^
src/image.cpp:79:34: error: expected primary-expression before ‘)’ token
_m128i xout = (_m128i) dst;
^
src/image.cpp:82:22: error: expected ‘;’ before ‘in1_16’
__m128i in1_16 = _mm_load_si128((_m128i)(xin));
^
src/image.cpp:83:22: error: expected ‘;’ before ‘in2_16’
__m128i in2_16 = _mm_load_si128((_m128i)(xin + 1));
^
src/image.cpp:84:22: error: expected ‘;’ before ‘out1_16’
__m128i out1_16 = _mm_srli_epi16(in1_16, 2);
^
src/image.cpp:85:22: error: expected ‘;’ before ‘out2_16’
__m128i out2_16 = _mm_srli_epi16(in2_16, 2);
^
src/image.cpp:86:22: error: expected ‘;’ before ‘out8’
__m128i out8 = _mm_packus_epi16(out1_16, out2_16);
^
src/image.cpp:87:35: error: ‘out8’ was not declared in this scope
_mm_store_si128(xout, out8);
^
src/image.cpp:87:39: error: ‘_mm_store_si128’ was not declared in this scope
mm_store_si128(xout, out8);
^
Makefile:106: recipe for target 'obj/image.o' failed
make: ** [obj/image.o] Error 1