intel-gpu-tools: fix i686 build

srcpkgs/intel-gpu-tools/patches/i686.patch

@@ -0,0 +1,22 @@
+--- lib/igt_x86.h.orig	2017-10-04 10:36:48.000000000 +0000
++++ lib/igt_x86.h	2017-10-07 08:15:28.264965837 +0000
+@@ -40,19 +40,7 @@
+ #define AVX	0x80
+ #define AVX2	0x100
+ 
+-#if defined(__x86_64__)
+ unsigned igt_x86_features(void);
+ char *igt_x86_features_to_string(unsigned features, char *line);
+-#else
+-static inline unsigned igt_x86_features(void)
+-{
+-	return 0;
+-}
+-static inline char *igt_x86_features_to_string(unsigned features, char *line)
+-{
+-	line[0] = 0;
+-	return line;
+-}
+-#endif
+ 
+ #endif /* IGT_X86_H */