Added some missing SSE versions that I've wanted a few times.

src/_premake_init.lua

@@ -1022,6 +1022,9 @@
 			"AVX2",
 			"SSE",
 			"SSE2",
+			"SSE3",
+			"SSSE3",
+			"SSE4.1",
 		}
 	}
 

src/actions/vstudio/vs2010_vcxproj.lua

@@ -1110,7 +1110,7 @@
 		elseif x == "AVX2" and _ACTION > "vs2012" then
 			v = "AdvancedVectorExtensions2"
 		elseif cfg.architecture ~= "x86_64" then
-			if x == "SSE2" then
+			if x == "SSE2" or x == "SSE3" or x == "SSSE3" or x == "SSE4.1" then
 				v = "StreamingSIMDExtensions2"
 			elseif x == "SSE" then
 				v = "StreamingSIMDExtensions"

src/tools/gcc.lua

@@ -74,6 +74,9 @@
 			AVX2 = "-mavx2",
 			SSE = "-msse",
 			SSE2 = "-msse2",
+			SSE3 = "-msse3",
+			SSSE3 = "-mssse3",
+			["SSE4.1"] = "-msse4.1",
 		},
 		warnings = {
 			Extra = "-Wall -Wextra",

src/tools/msc.lua

@@ -66,6 +66,9 @@
 			AVX2 = "/arch:AVX2",
 			SSE = "/arch:SSE",
 			SSE2 = "/arch:SSE2",
+			SSE3 = "/arch:SSE2",
+			SSSE3 = "/arch:SSE2",
+			["SSE4.1"] = "/arch:SSE2",
 		},
 		warnings = {
 			Extra = "/W4",