iOS, update to version 11.1

Change-Id: I3e477162468ad7386d83480ce8ae1da9536465b0

README.md

@@ -43,7 +43,7 @@ run and compile LibreOffice, also used by the TDF builds:
     * Build: GCC 4.8.1 or Clang
 * iOS (only for LibreOfficeKit):
     * Runtime: 11.0 (only support for newer i devices == 64 bit)
-    * Build: Xcode 9.0 and iPhone SDK 11.0
+    * Build: Xcode 9.0 and iPhone SDK 11.1
 
 If you want to use Clang with the LibreOffice compiler plugins, the minimal
 version of Clang is 3.4. Since Xcode doesn't provide the compiler plugin

configure.ac

@@ -2847,15 +2847,15 @@ if test $_os = iOS; then
     AC_MSG_CHECKING([what iOS SDK to use])
     if test "$enable_ios_simulator" = "yes"; then
         platform=iPhoneSimulator
-        versionmin=-mios-simulator-version-min=10.3
+        versionmin=-mios-simulator-version-min=11.1
     else
         platform=iPhoneOS
-        versionmin=-miphoneos-version-min=10.3
+        versionmin=-miphoneos-version-min=11.1
     fi
     xcode_developer=`xcode-select -print-path`
 
-    current_sdk_ver=11.0
-    for sdkver in 11.1 11.0; do
+    current_sdk_ver=11.1
+    for sdkver in 11.1; do
         t=$xcode_developer/Platforms/$platform.platform/Developer/SDKs/$platform$sdkver.sdk
         if test -d $t; then
             ios_sdk=$sdkver