updated pjsip stack
There is still a bug on incoming calls when buiding for android
diff --git a/jni/pjproject-android/pjsip-apps/src/pjsua/ios/ipjsua.xcodeproj/project.pbxproj b/jni/pjproject-android/pjsip-apps/src/pjsua/ios/ipjsua.xcodeproj/project.pbxproj
index 8d1f9d3..5c0b4c6 100644
--- a/jni/pjproject-android/pjsip-apps/src/pjsua/ios/ipjsua.xcodeproj/project.pbxproj
+++ b/jni/pjproject-android/pjsip-apps/src/pjsua/ios/ipjsua.xcodeproj/project.pbxproj
@@ -420,6 +420,7 @@
 				);
 				ONLY_ACTIVE_ARCH = YES;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				VALID_ARCHS = armv7;
 				WRAPPER_EXTENSION = app;
 			};
 			name = Debug;
@@ -454,6 +455,7 @@
 				);
 				ONLY_ACTIVE_ARCH = YES;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				VALID_ARCHS = armv7;
 				WRAPPER_EXTENSION = app;
 			};
 			name = Release;