Limit min deploy to iOS8 since current MIDI uses AVFoundation which introduced this version

ios/SDLPal/SDLPal.xcodeproj/project.pbxproj

@@ -1165,6 +1165,7 @@
 				);
 				INFOPLIST_FILE = "SDLPal/SDLPal-Info.plist";
 				INIT_ROUTINE = "";
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				OTHER_LDFLAGS = (
 					"$(inherited)",
 					"-ObjC",
@@ -1206,6 +1207,7 @@
 				);
 				INFOPLIST_FILE = "SDLPal/SDLPal-Info.plist";
 				INIT_ROUTINE = "";
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				OTHER_LDFLAGS = (
 					"$(inherited)",
 					"-ObjC",