iOS, update to xcode 9.2

Change-Id: Id7962a0e40d2341fbe5f702399478f926c0ef5bf

ios/LibreOfficeLight/LibreOfficeLight.xcodeproj/project.pbxproj

@@ -203,7 +203,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0820;
-				LastUpgradeCheck = 0910;
+				LastUpgradeCheck = 0920;
 				ORGANIZATIONNAME = jani;
 				TargetAttributes = {
 					397E08F91E597BD8001374E0 = {
@@ -488,7 +488,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.jani.Editors.LibreOfficeLight;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OBJC_BRIDGING_HEADER = "LibreOfficeLight/lokit-Bridging-Header.h";
-				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
 				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = 2;

ios/LibreOfficeLight/LibreOfficeLight.xcodeproj/xcshareddata/xcschemes/DEVICE DEBUG.xcscheme

 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0910"
+   LastUpgradeVersion = "0920"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

ios/LibreOfficeLight/LibreOfficeLight.xcodeproj/xcshareddata/xcschemes/DEVICE RELEASE.xcscheme

 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0910"
+   LastUpgradeVersion = "0920"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

ios/LibreOfficeLight/LibreOfficeLight.xcodeproj/xcshareddata/xcschemes/SIMULATOR.xcscheme

 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0910"
+   LastUpgradeVersion = "0920"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"