Add fcrypt include path to iOS build.

xcode/libzip.xcodeproj/project.pbxproj

diff --git a/xcode/libzip.xcodeproj/project.pbxproj b/xcode/libzip.xcodeproj/project.pbxproj
index ed11ee4..1f7f31f 100644
--- a/xcode/libzip.xcodeproj/project.pbxproj
+++ b/xcode/libzip.xcodeproj/project.pbxproj
@@ -2607,6 +2607,7 @@
 				GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES;
 				GCC_WARN_PEDANTIC = YES;
 				GCC_WARN_SIGN_COMPARE = YES;
+				HEADER_SEARCH_PATHS = "../lib/gladman-fcrypt";
 				INFOPLIST_FILE = Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Bundles";
 				LINK_WITH_STANDARD_LIBRARIES = NO;
@@ -2630,6 +2631,7 @@
 				GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES;
 				GCC_WARN_PEDANTIC = YES;
 				GCC_WARN_SIGN_COMPARE = YES;
+				HEADER_SEARCH_PATHS = "../lib/gladman-fcrypt";
 				INFOPLIST_FILE = Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Bundles";
 				LINK_WITH_STANDARD_LIBRARIES = NO;