Fixed Linux build more

This was SVN commit r6168.

build/premake/premake.lua

@@ -140,7 +140,10 @@ function package_set_build_flags()
 	
 				-- do something (?) so that ccache can handle compilation with PCH enabled
 				"-fpch-preprocess",
-	
+
+				-- enable SSE intrinsics
+				"-msse",
+
 				-- speed up math functions by inlining. warning: this may result in
 				-- non-IEEE-conformant results, but haven't noticed any trouble so far.
 				"-ffast-math",

source/lib/sysdep/arch/x86_x64/x86_x64.cpp

@@ -26,13 +26,13 @@
 #if ARCH_IA32
 # include "../ia32/ia32_asm.h"
 #else
-#include "../amd64/amd64_asm.h"
-# endif
+# include "../amd64/amd64_asm.h"
+#endif
 
 #if MSC_VERSION
 # include <intrin.h>	// __rdtsc
 #elif GCC_VERSION
-# include <emmintrin.h>
+// (no includes needed)
 #else
 # error compiler not supported
 #endif