Added Android support, and generalized target triple support

Added PICLevel, RelocKind
DarwinCommon/LinuxCommon/AndroidCommon merged into PosixCommon
Mangling changed to avoid '@'

IDE/src/util/TargetTriple.bf

@@ -0,0 +1,55 @@
+using System;
+
+namespace IDE.Util
+{
+	class TargetTriple
+	{
+		public static bool IsTargetTriple(StringView str)
+		{
+			int dashCount = 0;
+			for (let c in str.RawChars)
+				if (c == '-')
+					dashCount++;
+			return dashCount >= 2;
+		}
+
+		public static Workspace.PlatformType GetPlatformType(StringView str)
+		{
+			var str;
+
+			// Remove version from the end
+			while (!str.IsEmpty)
+			{
+				char8 c = str[str.Length - 1];
+				if ((c.IsDigit) || (c == '.'))
+					str.RemoveFromEnd(1);
+				else
+					break;
+			}
+
+			bool hasLinux = false;
+
+			for (let elem in str.Split('-'))
+			{
+				switch (elem)
+				{
+				case "linux":
+					hasLinux = true;
+				case "windows":
+					return .Windows;
+				case "macosx":
+					return .macOS;
+				case "ios":
+					return .iOS;
+				case "android",
+					 "androideabi":
+					return .Android;
+				}
+			}
+
+			if (hasLinux)
+				return .Linux;
+			return .Unknown;
+		}
+	}
+}